Identify the best use of this map for a historian.

The answer is B

Explanation:

Early civilizations settled along rivers so that they would always have sources of water. They could also follow the rivers to other resources. This map gives historians ideas of where these early civilizations settled.

Ifound this on google “separation of powers. a fundamental principle of the united states government, whereby powers and responsibilities are divided among the legislative branch, executive branch, and judicial branch.” i hope this you for what your looking for