Question 28: Based on the information in the passage, why did the return of wolves lead to the recovery of riverside vegetation? A. Because...

Question 28: Based on the information in the passage, why did the return of wolves lead to the recovery of riverside vegetation?

A. Because wolves directly planted young willow and aspen trees along the riverbanks.

B. As a result of wolves building dams that provided the necessary water for trees to grow.

C. Because the threat of wolf attacks forced elk to avoid grazing in vulnerable open areas.

D. Due to the fact that elk populations were completely eliminated from the park's valleys.