Answer: Neolithic Revolution. The Neolithic Revolution changed the way humans lived. The use of agriculture allowed humans to develop permanent settlements, social classes, and new technologies. Some of these early groups settled in the fertile valleys of the Nile, Tigris-Euphrates, Yellow, and Indus Rivers.
Explanation: <em><u>PLEASE MARK AS BRAINLIEST</u></em>
Answer:
Because many ethnic groups do not agree with one another and it can lead to conflict.
Explanation:
Congress
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1. Motion of the planets
2. An ellipse