Answer: Chinese Muslim traders from the eastern coast of China arrived at the coastal towns of Indonesia and Malaysia in the early 15th century. They were led by the mariner Zheng He, who commanded several expeditions to southeastern Asia between 1405 and 1430.
Explanation:
I believe it was the failure of pumps and levees, to keep the floods from happening.
Asthenosphere is Earth's mechanical layers that is most easily deformed.
The Asthenosphere is Earth’s mantle’s upper layer which is weak mechanically and ductilely deforming region. It is situated below the lithosphere wherein there is comparatively little resistance to the flow of plastic and the convection is thought to happen.
Evolution of the brain and more interaction with the world. With the evolution of there brain they got more curious
