Which of the following environmental changes would increase the stability of an ecosystem?
A. A reduction of resources that increases completion.
B. An expansion of available land and increased biodiversity.
C. Introduction of a predator that preys on specific populations.
D. Climatic changes alter the length of a growing season of plants.

Would be option B. An expansion of available land and increased biodiversity

(Sorry if it's incorrect)

Explanation:

A. would be wrong because it would de decrease this ability of an ecosystem, so that's wrong.

B. would be right because It will increase the amount of wilderness which would help the ecosystem.

C. would be wrong because it would decrease the amount of natural animals in the area.

D. would easily be wrong because it would It would affect the growing rate of the plants and could kill them, which would affect the animals, overall affecting the nearby ecosystem.

So, at least you with option B as being correct.

B. An expansion of available land and increased biodiversity

Explanation:

Because if we expand the land for biodiversity that is plants and animals to thrive, than the stability of ecosystem will increase.

the sphincter muscles at the end of the digestive tract is the anus.