Why were there so many diverse societies in america before europeans arrived

Why is the federal reserve managed under the oversight of the federal government? the fed is responsible for printing and coining money.the fed is responsible for collecting income taxes.the fed is responsible for the government’s money.the fed is responsible for paying off government debt.(the first option isn't correct i tried that one)edit: the answer is the fed is responsible for the government’s money.

Although china's total economic output, measured by gross domestic product (gdp), is third largest in the world, it is considered a developing nation. what is most likely the most important factor for this designation?

What area is it likely to have the most population