Respuesta :
In addition to receiving the resources and land, the US had to deal with many natives, which ended up with relocating them to reservations, allowing the US to take the resources and the land.
Answer:
Among the most serviceable inventions in practical mining and metallurgy in the late 19th century were the California stamp mill for crushing quartz, the mercury amalgamation process for gold, the panning process for silver, the hydraulic process of gold mining in alluvial regions, the application of new explosives to rocks, new methods of drilling, new blast-furnaces, and new methods of converting iron into steel.
Explanation: