What did the river valley civilizations have in common? what were the main differences between them?

There are four settled societies that each developed agriculture independently along major rivers that are traditionally considered the early river valley civilizations. The are the Mesopotamian civilizations, the Nile River civilizations, the Indus River civilizations, and the Yellow and Yangtze River civilizations.

Answersource rock;

Answer they are produced by collision of tectonic plates;