WORLD HISTORY

Detailed explanation-1: -When the river overflows, this fertile soil deposits on the banks of rivers. Thus, bringing fresh fertile soil constantly to the fields. Most importantly, rivers help in agriculture. In fact, a lot of farmers depend on rivers for agricultural purposes.

Detailed explanation-2: -Two rivers, the Tigris and the Euphrates, regularly flooded the region, and the Nile River also runs through part of it. Irrigation and agriculture developed here because of the fertile soil found near these rivers. Access to water helped with farming and trade routes.

Detailed explanation-3: -alluvial deposit, Material deposited by rivers. It consists of silt, sand, clay, and gravel, as well as much organic matter.

Detailed explanation-4: -The area between the rivers is known as Mesopotamia, “the land between the rivers.” The two rivers provided early settlers with rich land to farm. The rivers flooded the land often leaving behind a layer of silt, a rich mixture of soil and bits of rock. This silt made the land perfect for growing crops.

Detailed explanation-5: -A river valley is fertile because when the river floods, it deposits sediment and organic material on the normally dry land. This provides fresh nutrients for plants to grow.