True or false ? the first great civilization all had one thing in common: access to a river or other natural water source that allowed them to grow surplus amount of food

This is true; one must have water in order to grow crops, without a source of water you cannot grow a surplus amount of food. Rivers such as the Nile in modern-day Egypt and the Ganges in modern-day India were water sources that the first great civilizations relied on.

Answermost of the time it would be ground into fine sediment,and sometimes they are carried away from the original location;