Answer:
. b the competition for western land and the resources it provided.
Step-by-step explanation:
Given white settlers on American soil decided to exploit the land in America to their satisfaction, including mining, etc, However, the native Americans are known to use their forest as a means of hunting games. This shows disagreement in the utilization of the land between the two, and often lead to war.
It can be said that the increase in violence between white settlers and Plains Indians most directly resulted from "the competition for western land and the resources it provided.":