Ответ:
The most important town in a country... is called the capital of the country.
A large town... is called a city.
A rounded and raised landform, not as high as mountain...is a volcano.
Low ground between hills... is the valley between the hills
A body of land surrounded by water, smaller than a continent... is an island.
A big piece of water with land around it... is a lake.
A large stream of water that flows across the land... is called a river.
The body of salt water covering nearly three fourths of the Earth's surface...is called the World ocean.
The weather that a place has...is called climate.