5. To accommodate the rapid human population growth, the water supply should increase by ( a 1 5 percent each year over a 15-year period. b 20 percent over a 15-year period.
c 50 percent over a 10-year period.
d 10 percent each year over the next two decades.

Which ecosystem best fits the characteristics listed below? which ecosystem best fits the characteristics listed below? ii. seasonal migrations of millions of wildebeests, zebras, and elephants iii. large numbers of predators, such as lions iv. acacia trees and grasses a. the congo rainforest b. the african mangroves c. the serengeti grasslands d. the sahel