What are three reasons as to why plains indians were rebelling against the white setter?

What was the result on the u.s. economy because of the major changes in atlantic shipping prior to and during the war of 1812?

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?

Jackson pollock described his art style in the following quote: “new needs need new techniques.… it seems to me that the modern painter cannot express this age, the airplane, the atom bomb, the radio, in the old forms of the renaissance or of any other past culture. each age finds its own technique.” what point is pollock making about the new styles of art?