One Word Substitution

An auctioneer is a person who conducts public sales where items are sold to the highest bidder. The phrase 'sell articles at public sale' directly describes the auctioneer's role.

An architect is a professional who plans and designs buildings. The phrase 'planning and drawing of the design of buildings' precisely describes what an architect does. A builder constructs, a decorator embellishes, and a glazier works with glass specifically.

A pilot is a person who flies airplanes. The context 'Although he wanted to fly airplanes' indicates the profession of operating aircraft, which is a pilot.

A grandfather is specifically 'father's father' - the parent of one's father. This is the direct definition of the term. Father would be incorrect, great grandfather is two generations up, and uncle is a sibling of one's parent.

An emigrant is someone who leaves their own country to settle permanently in another. The key phrase is 'left his country to settle' - emigration focuses on leaving the origin. An immigrant enters a new country, repatriate returns, and 'he was expatriate' is grammatically incorrect.

An altruist is someone who selflessly devotes their life to the welfare and interests of others. A sadist derives pleasure from pain, a philanthropist donates money (not necessarily their life), and an egoist focuses on self-interest.

A theist is someone who believes in the existence of God or gods. An atheist rejects belief in deities, while a polytheist believes in multiple gods. An iconoclast attacks cherished beliefs or institutions, which doesn't fit the context of being a 'firm believer of God'. The mother's belief in God directly corresponds to the definition of a theist.

A philatelist is a person who collects or studies postage stamps as a hobby. The term comes from the Greek words 'philos' (loving) and 'ateleia' (tax-free). 'Stamp collector' is a literal description but not the formal term. 'Stumper' is unrelated to stamp collection, and 'none of these' is incorrect since a formal term exists.

To elope means to run away secretly to get married, especially without parental consent. The word perfectly captures the scenario described. 'Chase' means to pursue but doesn't imply marriage. 'Shabby' means worn or decayed, completely unrelated. 'Abscond' means to escape hurriedly or secretly but doesn't specifically indicate marriage.

A novelist is specifically a writer of novels, which matches the description perfectly. A poet writes poetry, a dramatist writes plays, and 'author' is a broader term that could include non-fiction writers. Since the wife specifically writes novels, 'novelist' is the most precise and appropriate term among the options.

Bilingual means fluent in two languages, which exactly describes Enna's ability. The term comes from 'bi-' (two) and 'lingua' (language). 'Belingual' and 'bilengual' are misspellings that don't exist in standard English. Since Enna speaks exactly two languages, bilingual is the correct term, making 'none of these' inappropriate.

A biography is a written account of a person's life written by someone else, which matches the description of writing about Lincoln's life. An autobiography is written by the person themselves. A lexicographer compiles dictionaries, and 'Anonymous' refers to an unnamed author, not a book type. Since the subject is writing about another person's life, biography is correct.

A polytheist believes in multiple gods or deities, which directly matches the statement about believing in 'many gods'. The term comes from 'poly-' (many) and 'theos' (god). An atheist believes in no gods, while an agnostic is uncertain about divine existence. 'Goddess' refers to female deities but isn't a term for someone who believes in them.

An oculist is a medical specialist who treats diseases and conditions of the eye. An optician makes and sells glasses and contact lenses but doesn't provide medical treatment. A gynecologist specializes in female reproductive health, while a pediatrician treats children. Since Peter treats eye diseases specifically, oculist is the correct term for his medical specialty.

A nephew is the son of one's sibling (brother or sister). This precisely describes Mr. William's brother's son. 'Nice' is a misspelling of 'niece' (daughter of a sibling). A 'cousin' would be the child of an aunt or uncle, not a direct sibling. 'Grand son' specifically refers to one's own descendant, not a sibling's child.

Looking on the brighter side of everything is the defining trait of an optimist - someone who maintains a positive outlook and focuses on favorable possibilities. A pessimist sees the negative, while a sadist derives pleasure from others' pain. The futurist focuses on future possibilities rather than current optimism.

Debonair describes a man who is charming, confident, and carefully dressed - it captures elegance and sophistication in appearance and manner. This French-derived word specifically conveys a well-groomed, socially confident male presence.

An introvert is someone who is shy, quiet, and finds it difficult to make friends easily - they tend to be inward-turning and gain energy from solitude. This matches the description perfectly. Extroverts are outgoing, ambiverts balance both traits, while unfriendly suggests intentional rudeness rather than shyness.

A philanthropist is a lover of mankind - someone who dedicates time or resources to helping others and promoting human welfare. An anthropologist studies human cultures, ethnologist studies ethnic groups, and archaeologist studies past civilizations. The question describes someone who loves mankind, not studies it.

An extrovert is an outgoing person who gains energy from social interactions and enjoys being around people. This directly contrasts with the introverted description of her brother. Ambiverts balance traits, while polite and intellectual don't capture the outgoing social nature.

Physiology is the scientific study of how the human body functions and works - it covers all bodily systems and processes. Psychology studies the mind, anthropology studies human cultures, and ethnology studies ethnic groups. The question specifically asks about body mechanics.

A monopoly is an exclusive right to buy and sell a commodity - where one entity controls the entire market for a product or service. A duopoly involves two sellers, a cartel is an alliance of sellers, and trader is too generic. The question describes exclusive control by one company.

The third quarter spans July, August, September. The second month of this quarter is August. This requires breaking the year into quarters (Q1: Jan-Mar, Q2: Apr-Jun, Q3: Jul-Sep, Q4: Oct-Dec) and counting within Q3. Note: 'entrepreneur' is misspelled in the question.

A teetotaler is someone who completely abstains from alcoholic drinks. This term specifically refers to the practice of avoiding alcohol entirely. A fruiter deals with fruit, alcoholic drinks alcohol, and vegetarian avoids meat - none match the specific meaning of abstaining from alcohol.