How did the lifestyle of the American Indians change with the closing of the American frontier?

It was hard to believe the two regions were part of the same country. The rapidly industrializing East bore no resemblance to most of the AMERICAN WEST. Except for few urban centers on the coast, the West knew nothing of cities. Instead, the West was an emerging patchwork of homestead farmers, miners, and cattle ranchers. While Easterners tried to make their way in these and other professions, Native Americans desperately clung to the hopes of maintaining their tribal traditions.

Explanation:

Conflict between whites and NATIVE AMERICANS was as old as the earliest settlements, but there were clear patterns of waxing and waning intensity. The transcontinental railroad became the catalyst for much of the new conflict. Before its completion, the only Americans to venture westward had done so on horseback or CONESTOGA WAGON. Now thousands more could migrate much more quickly, cheaply, and comfortably. As the numbers of white settlers from the East increased dramatically, conflicts with the native tribes did so as well.

the answer is use of support