All of the following changed the american prairie except:
a. barbed wire
b. windmills and irrigation
c. extermination of the buffalo
d. heavy rainfall

All of the following changed the American prairie except d)heavy rainfall. Barbed wire was used for farming to keep certain animals enclosed, windmills and irrigation are now being used as biofuels on the prairie in the American mid-west and since the buffalo is an essential part of the prairie, its existence is necessary. Heavy rainfall is rare in the prairie, as precipitation is not likely to occur in such an arid landscape.