How did different cultural regions form in North America?

groups adapted to the environments in which they settled. which of these characterizes an American Indian cultural region? ... American Indians who lived on the plains wore clothing made from animal hides.

nativists tried to get rid of the immigrants as they thought they were going to ruin the u.s.  

the national congress's powers over the states were specific and definite: it had the sole power to negotiate treaties, declare war, and make peace. all powers not granted to congress were reserved for state governments. congress had no power to levy taxes, for example.