Astride horses, American Indians could hunt far more effectively in many parts of the West, especially among the vast herds of bison on the Great Plains. Those bison were hunted not just for their meat but also their hides, which women processed into robes to feed a hungry market in the east and Europe. Horses thus expanded Native trade and brought a flow of new items into their lives—a trade invigorated also because Indians could travel so much farther and faster than before. As from the time of the first horse cultures in central Asia, western Indians exploited a new military potential. Some groups quickly developed astonishing skills as mounted warriors and proceeded to expand their hunting and trading territories against weaker neighbors. –Elliott West "The Impact of Horse Culture” Despite geographic separation and diverse environments, many American Indian peoples used some common practices. According to the excerpt, which practice was unique to the Plains Indians? A) The use of hunting both for food and for material resources such as skins and bone. B) The division of labor between males and females to meet the needs of the community. C) The development of permanent settlements for trade and agriculture. D) The use of the domesticated horse in hunting and warfare.

D) The use of the domesticated horse in hunting and warfare.

Explanation:

With horses now domesticated, the Indians could travel so much further than before which led to them being able to hunt animals more effectively in many parts of the land.

The Indians also used the horses in warfare as some of them got so adept at using horses that they developed astonishing qualities which they then used to expand their territories against weaker tribes.

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.  

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers