National Atlas of the United States, May, 2013
Review this map of the Native American tribes of the Great Plains. What is the best explanation as to why there are so
many tribes in this area of the United States?

The tribes do not have the ability to cross the rivers.
There is a shortage of uncontested tribal land in this area.

The rivers provide the tribes with abundant food resources.

The very mountainous region creates cultural divisions among the tribes.