Each year, the waters of the Tigris and Euphrates Rivers overflow their banks in the Fertile Crescent. How did early farmers modify their environment to manage these conditions?

The Tigris and Euphrates flooded regularly, so farmers dug irrigation canals to redirect and manage the water. Canals helped move floodwater to fields and reduce the danger of uncontrolled flooding. The correct choice is “They dug irrigation canals to control flooding.”

AI-written and checked against the verified answer.