Answer:
ninety million acres
Explanation:
As a result of the Dawes Act, over ninety million acres of tribal land were stripped from Native Americans and sold to non-natives.
Civilizations developed around rivers because their waters provided places to hunt and fish.
Also, as the rivers flooded, the lands around them became fertile. This allowed them to support farming.
In addition, because they provided a steady supply of drinking water.
Moreover, goods and people could be transported easily
Finally, River valleys not only have water, they also often have a broad, flat floodplain that is readily adapted to agriculture.
Answer:
they were used to power ships and train
