Which was Charles Darwin's contribution to the study of biology? - He was the first person to recognize that organisms change over time.

- He believed that organisms adapted through the inheritance of acquired traits.

-He explained how traits are passed from parents to offspring.

- He proposed that natural selection is the primary mechanism of evolution.

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