The "cradles of civilization" have been

A. Valleys

B. Plains

C. Plateaux

D. Hills

Answer: Option B

Solution(By Examveda Team)

The "cradles of civilization" have been Plains. In Mesopotamia, the convergence of the Tigris and Euphrates rivers produced rich fertile soil and a supply of water for irrigation.It is because of this that the fertile crescent region, and Mesopotamia in particular, are often referred to as the "cradle of civilization".