Why did the US want Industry?

Many factors combined to produce this burst of industrial activity. The exploitation of Western resources, including mines and lumber, stimulated a demand for improved transportation, while the gold and silver mines provided new sources of capital for investment in the East. The construction of railroads, especially in the West and South, with the resulting demand for steel rails, was a major force in the expansion of the steel industry and increased the railroad mileage in the United States from less than 93,262 miles (150,151 kilometres) in 1880 to about 190,000 miles (310,000 kilometres) in 1900.

Explanation:

answer: the apache, comanche, kiowa, crow, and osage tribes are plains indians.