Answer: D. To hunt bison that travelled the region.
The Plains Indians are the Native American tribes that traditionally lived on the Interior Plains of North America.
These people survived on hunting and gathering. They had a nomadic lifestyle that followed the seasonal migratory patterns of the American bison. They relied on the bison for most of their everyday items, including food, tools and clothing. They lived in teepees because they were easy to disassemble and carry.