Homeostasis is the body's natural tendency to maintain internal balance. match the outside environment. fluctuate with stimuli. change slowly over time.

Homeostasis is the body's natural tendency to maintain internal balance. In other words, it is the state of maintaining a stable internal environment despite changes to the external environment.

Tendency to maintain body's internal balance.

Explanation:

The Homeostasis can be defined as the ability of the body to maintain to internal environment of the body.

There is an equilibrium maintained inside the body which helps the body in carrying out various metabolic reactions inside the body.

If there is a change in the internal temperature or pressure then the balance inside the body will be disturbed.

The role of the body is to maintain the internal balance of the body despite of the changing environment outside the body.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."