It ended with the destruction of the Abbasid caliphate when hugelu khan sacked Baghdad in 1258
"To accommodate for lack of dependable rainfall" would be the best option as to why the ancient Chinese organized large groups of people to build and maintain irrigation systems, since when rainfall would not come for long periods of time, the crops would likely die without proper irrigation.
Answer:
The ancient Sumerians, believed their gods lived in the sky. In order for the gods to hear better, you needed to get closer to them. Ziggurats were huge, with built in steps. The priests would collect and use these gifts since they were the representatives of the gods on earth.
Explanation:
In Africa, a number of specialized occupations developed ,highly skilled metal smiths developed more effcient tool that increase agricultral produtivity. they also produce improved weapons ,which became important in the expansion of kingdoms.
B. A merchant in the Maryland Colony unloads fur from a Spanish ship in exchange for corn.