Which of the following happened during the 1600s that dramatically changed the living environment and main food source of the plains indians? a. they were forced off the great plains by spanish settlers. b. they struck gold in the sierra nevada. c. they adopted the ways of european settlers. d. they captured and tamed wild horses.

Which reason best explains why certain areas of southwest asia have low population density? a. the semi-arid climate makes farming difficult because it produces very little rainfall.b. the moist climate limits job opportunities because it reduces oil production.c. the semi-arid climate produces heavy rainfall that contributes to devastating floods. d. the moist climate reduces agricultural production by causing water shortages.