Homeostasis refers to:

A) a kind of sexual energy
B) maintenance of an optimum level of biological conditions
C) sensation-seeking
D) engaging in an act for its own sake, without any external reward

Homeostasis

The process by which biological systems maintain stability and equilibrium within their internal environment despite changes in their external environment.

Biological Conditions

Physical states that affect the function and behavior of organisms, often relating to health and disease states.