Answer:
The Plain Indians are the Native American tribes and First Nation band governments who have historically lived on the Great Plains. And, also the Canadian Prairies in North America.
Their economy is based on the hunting-farming cultures for centuries prior to European contact. Historic horse cultures that flourished from the 17th century through the late 19th century was well documented. Their nomadic lifestyle of hunting animals, living within an enclosed cluster, raising crops as well as trading with other tribes was successful till the white migration to their lands.
The migration led to the fight between the whites who tried to dominate them and the original land owners. after the success of the war (for the white), the cultures and traditions of the Plain Indians were banished. In schools, their history was not taught leading to loss of information about them.
Explanation: