Stop get sum help

(im lookin at u simps)

Government powers not provided to the national government in the us constitution but are rather given to the states by the 10th amendment is called?

Why do many scientists suppose the land bridge theory of migration?

What eventually brought an end to the brook farm experiment? a.) george ripley ran out of money to fund it. b.) many former inhabitants spoke badly about it in the press. c.) a fire destroyed the central building of brook farm. d.) the experiment never recovered after a mass exodus of inhabitants in 1848.