Compared to farms of 100 years ago, modern agribusinesses need

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

Which would be the most useful source of evidence to support mcneill's contention?

Why does miranda have that particular vision of dr hildesheim answer?