Homeostasis is a systems concept that describes the tendency of a system to maintain or preserve:

A) ​equilibrium or balance.
B) ​limitations or rules.
C) ​guidelines or boundaries.
D) ​strengths or weaknesses.

Homeostasis refers to the tendency of a system to maintain or restore equilibrium or balance in the face of changing external or internal conditions. This is achieved through various physiological and behavioral mechanisms that operate to stabilize the system and prevent it from deviating too far from its set point. Examples of homeostatic systems in the body include temperature regulation, blood sugar control, and pH balance.