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.

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44

d) post-world war i