Questions: Homeostasis

The answer is the second one (Homeostasis): the tendency for a system to maintain a relatively stable, constant state of balance.

Explanation for each option:

1. Equifinality: This refers to the principle that in open systems, a given end state can be reached by many potential means or from different initial conditions. It does not specifically refer to maintaining a stable state.
2. Homeostasis: This is the correct answer. Homeostasis is the tendency of a system, especially the physiological system of higher animals, to maintain internal stability, owing to the coordinated response of its parts to any situation or stimulus that would tend to disturb its normal condition or function.
3. Differentiation: This refers to the process by which cells or parts of an organism change during development to serve a specific function. It does not relate to maintaining a stable state.
4. Entropy: In the context of thermodynamics, entropy is a measure of disorder or randomness in a system. It generally refers to the tendency of systems to move towards disorder, not stability.

Summary: Homeostasis is the term that describes the tendency for a system to maintain a relatively stable, constant state of balance.