Question

Why were the river valleys of the Yellow River, the Tigris and Euphrates Rivers, and the Indus River centers of early civilization?

A.
The rivers created the power for early mills and simple machines.
B.
The rivers were natural defenses against invasion by other civilizations.
С.
The rivers carried valuable minerals down from surrounding
mountains.
D.
The rivers provided rich soil and nutrients to the lands surrounding them.

Answer 1

The answer is d.

Step-by-step explanation:

The rivers carried silt, which is fine bits of clay or sand found at the bottom that had many nutrients. The silt that washed up from the rivers made the land surronding the rivers good land for farming, which resulted in alot of extra food, or surpluses.