The human body works constantly to maintain a stable, internal environment. This environment is called

A) equilibrium.

B) fitness.

C) health.

D) homeostasis.

The environment in which the body works constantly to maintain stability is called homeostasis. Equilibrium is being achieved, but does not define the environment itself. Homeostasis in humans can be seen when we sweat or shiver from cold. The physical reactions are an attempt to restore internal body temperatures to a more comfortable range.

I believe the correct answer from the choices listed above is option D. The human body works constantly to maintain a stable, internal environment. This environment is called homeostasis. It refers to any self-regulating process by which biological systems tend to maintain stability while adjusting to conditions that are optimal for the body.