In what type of geographic location did humans tend to develop civilizations?

plains

mountains

deserts

river valleys

The best and most correct answer among the choices provided by the question is the fourth choice "river valleys"

The first great civilizations all grew up in river valleys. The oldest, 3300 to 2500 BCE, was along the Tigris and Euphrates rivers in the Middle East; the name given to that civilization, Mesopotamia, means "land between the rivers".

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Britain and its empire stood alone against hitler and mussolini. in june 1941, hitler broke the non-aggression agreement with stalin and germany invaded the soviet union. in december, japan attacked the us and britain. the main lines of world war ii had formed.

Italy , germany, austria, japan, and brazil.