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.

The answer is cultural