A reason Jamestown settlers struggled to survive was that they were not used to doing physical labor. were looking for the Roanoke colonists. befriended the Powhatan people. had been successful farmers in England.

answer; i believe the answer is (mesopotamia); modern day

by creating a labor shortage that pushed the continent toward a market economy

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;