Answer:
ensures that conditions in an organism do not vary too much above or below their set points
Explanation:
Homeostatis is the internal default state of an organism. When there is a change in the variables affecting the human body there are two ways by which it reacts
Positive feedback: Where the variable causing a change is further caused to change
Negative feedback: Where the variable causing a change is not allowed to cause change in the organisms body beyond a certain point.
Hence, the option "ensures that conditions in an organism do not vary too much above or below their set points" is the correct option.