Which was a first step in the development of civilization in both the egyptian and mesopotamian societies

Both the Egyptian and Chinese societies had to be able to find a way to irrigate water in order to fertilize their crops. Mesopotamia, "land of rivers") is in the area of the Tigris–Euphrates river system, largely corresponding to modern-day Iraq, northeastern Syria, southeastern Turkey and southwestern Iran..           there you go I hope it helps u

Internal combustion engines