World Physical Geography

Basalt is the predominant rock type found on the ocean floor, formed from volcanic eruptions at mid-ocean ridges. It is a fine-grained igneous rock that makes up the majority of the Earth's oceanic crust. While basalt is itself an igneous rock, option A is too general - the question specifically asks for the main rock type of the sea bottom.

Granite is a coarse-grained igneous rock formed from the slow cooling of magma deep beneath the Earth's surface. It is the most common intrusive igneous rock found in continental crust. Granite is composed mainly of quartz and feldspar with minor amounts of mica and other minerals.

Coal is classified as an organic sedimentary rock formed from the remains of ancient plants that were buried and compressed over millions of years. Unlike igneous rocks (formed from cooling magma) or metamorphic rocks, coal contains organic carbon and originates from biological sources. It is the only organic rock among the options.

Inselbergs are isolated rock hills or mountains that rise abruptly from a flat, surrounding plain. They are typically formed in hot, dry regions through differential weathering - where harder rock resists erosion while softer surrounding material wears away. The term comes from German meaning 'island mountain'. Examples include Uluru in Australia and Sugarloaf Mountain in Brazil.

The Maharashtra plateau is primarily composed of basalt rock, part of the vast Deccan Traps volcanic province formed about 66 million years ago. This extensive basaltic lava flow covers much of western and central India. The basalt gives the region its characteristic black soil (regur), which is very fertile for cotton cultivation.

The Danube River is the second-longest river in Europe and flows through multiple countries before emptying into the Black Sea via the Danube Delta in Romania. The Saint Lawrence flows into the Atlantic Ocean, the Zambezi into the Indian Ocean, the Godavari into the Bay of Bengal, and the Yamuna is a tributary of the Ganges.

Mount Olympus is the highest mountain in Greece and the legendary home of the Greek gods in mythology. It is located in the Olympus Range in northern Greece, near the Gulf of Salonika. The mountain has several peaks, the highest being Mytikas at 2,917 meters.

Devil's Tower (also called Bear Lodge) is a prominent igneous butte located in northeastern Wyoming, USA. It rises dramatically 1,267 feet above the surrounding terrain and was designated as the first U.S. National Monument in 1906. The tower is formed of columnar phonolite porphyry and is sacred to several Native American tribes.

The Mosquito Coast (Miskito Coast) is a historical region along the eastern coast of present-day Nicaragua and Honduras, bordering the Caribbean Sea. It was named after the Miskito people indigenous to the area. The region was a British protectorate during the colonial period and appears in historical accounts and Paul Theroux's novel.

Victoria Falls is located on the Zambezi River, forming the border between Zambia and Zimbabwe. It is one of the largest and most famous waterfalls in the world, known locally as 'The Smoke That Thunders'.

Coal is a classic example of a fund resource - a non-renewable natural resource that can be used but cannot be replenished on human timescales. Igneous rocks and basalt are rock types, while inselberg is a landform, not a resource.

The Danube is the second-longest river in Europe (after the Volga in Russia), flowing through 10 countries including Germany, Austria, Hungary, and Romania. It is a major international waterway.

Norway is known as the 'Land of the Midnight Sun' because during summer months, areas north of the Arctic Circle experience 24 hours of daylight. This phenomenon occurs from late May to late July.

Mount Fuji (Fujiyama) is an active stratovolcano and the highest peak in Japan, located on Honshu Island. It holds deep cultural and religious significance in Shinto tradition and has been worshipped as a sacred mountain.

Volcano Antofalla (also called Antofagasta) is located in the Catamarca Province of northwestern Argentina. It is one of the highest volcanoes in the Andes mountain range, reaching approximately 6,409 meters in elevation.

The East African Rift Valley system is the largest continental rift on Earth, stretching over 6,000 km from the Afar Triangle in Ethiopia to Mozambique. It is an active continental rift zone where the African Plate is splitting into two.

Mount Cameroon is an active volcano located in West Africa, near the Gulf of Guinea in Cameroon. It is the highest peak in West Africa at 4,040 meters and is one of Africa's most active volcanoes.

Approximately three-quarters of the African continent lies within the tropics (between the Tropic of Cancer and Tropic of Capricorn). This is because the equator runs through the center of the continent, placing most of its landmass in tropical latitudes.

The Kariba Dam is built on the Zambezi River, located on the border between Zambia and Zimbabwe. It is one of the largest dams in the world and created Lake Kariba, one of the largest man-made lakes by volume.

The Kariba Dam is built on the Zambezi River, located on the border between Zambia and Zimbabwe. Completed in 1959, it is one of the largest hydroelectric dams in the world.

Mount Cameroon is an active volcano located in West Africa, near the Gulf of Guinea in Cameroon. Standing at 4,040 meters, it is the highest peak in West Africa and one of Africa's most active volcanoes.

Nashik (also spelled Nasik) is a major city in Maharashtra, India, situated along the banks of the Godavari River. The Godavari is the longest river in peninsular India and holds significant religious and cultural importance. The other options - Saint Lawrence (Canada/USA), Zambezi (Africa), Yamuna (India), and Danube (Europe) - are major rivers in different continents.

Venice, famous for its canals and historic architecture, is built on 118 small islands in the Venetian Lagoon along the Adriatic Sea. The city is connected by numerous bridges and is renowned for its unique water-based urban design. The other options are countries or regions, not cities built on islands in a lagoon.