Use the drop-down menus to complete the sentence. The people of the North American Southwest built homes made of blank , while the tribes of the Arctic built homes out of blank .
for the first blank= #1bison hide, #2 snow blocks, #3 dried mud, #4 young trees.
for second blank= #1 snow blocks, #2 dirt mounds, #3 thatched straw,#4 animal skin