One Word Substitution

Explanation for option 3: It is correct.

Explanation for option 1: It is correct.

Amphibious describes animals capable of living both on land and in water, like frogs, toads, and salamanders. The term comes from Greek meaning 'living a double life' in both environments.

An ascetic is someone who practices strict self-denial and renounces material comforts and pleasures, often for spiritual or philosophical reasons. This differs from a theist (believes in God) or mystic.

Aristocracy is a form of government where power is held by nobles or privileged, hereditary ruling class. The term comes from Greek 'aristos' meaning 'best' combined with 'kratos' meaning 'power'.

Oligarchy is a form of government where power rests with a small number of people. The word comes from Greek 'oligos' (few) and 'arkhein' (to rule) - literally 'rule by the few'.

Plutocracy is a government controlled by wealthy people. The term derives from Greek 'ploutos' (wealth) and 'kratos' (power) - literally 'rule by the wealthy', not theft or dictatorship.

An atheist is someone who explicitly denies or disbelieves the existence of God or deities. The term comes from Greek 'a-' (without) + 'theos' (god).

An ambassador is a high-ranking diplomatic representative sent by one country to another. They serve as their government's official representative in a foreign nation.

Autocracy is a system of government where one person holds absolute power. The term derives from Greek 'auto' (self) + 'kratos' (rule), meaning self-rule.

Bureaucracy refers to government administration carried out by non-elected officials. It describes a system where decisions are made by state officials rather than elected representatives.

Democracy is a system where power is held by the majority of the people. The term comes from Greek 'demos' (people) + 'kratos' (rule), meaning rule by the people.

Theocracy is government by priests or religious leaders who claim to rule in the name of God or divine authority. The term combines 'theo' (god) + 'kratos' (rule).

Alimony is a financial allowance paid to a former spouse after legal separation or divorce. It is intended to provide support and maintain living standards.

An autobiography is a self-written account of a person's life. The prefix 'auto-' means self, distinguishing it from biography which is written by someone else.