Answer:
river valleys
Explanation:
The river valleys were the perfect setting for development of agriculture and farming as early civilizations experienced the agricultural revolution.
Humans stopped being hunters when this revolution ocurred.
The best examples of this cultures are the Indus, Egypt (the Nile River), ancient Mesopotamia (Tigris and Euphrates), and the Chinese (Yellow River).
As the agrarian economy developed societis were cultivating lands as primary source and flourished with innovations on agriculture and better harvesting. River valleys provide rich soil, fertile, with regular flooding that stimulates plants to grow.
See below :)
