The Neolithic Revolution describes the change from settled human life to nomadic lifestyles
period when humans learned to use stone and wood tools
time from when the first human skeletons were discovered
transition from hunting and gathering to settled agriculture

The main difference between hunter-gatherer societies and agricultural communities is that the hunter-gatherers only hunt for as much food as they consume in one "sitting", which farmers produce far more than needed for a single meal and either save or sell the rest.

i think

Explanation:

If the Aswan High Dam were to be destroyed, the Nile Valley would be hit with a wall of water that would not be able to stop until it reached the Mediterranean Sea. A destructive wall of water moving north would reach every major city in Egypt, and afterwards the country would have little access to clean water