What would be limiting factors in an ecosystem a) population and nutrients b) population and space c) nutrients and space d) nutrients and population

Whay is the following best defines climate

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

Describe the function of the endomembrane system? what organelles are involved?