Step 1: Understand the concept.
- Homeostasis is the correct term for the body's effort to maintain internal physiological balance (e.g., temperature, pH levels, glucose levels).
- Intrinsic motivation refers to engaging in activities for inherent satisfaction and is related to psychological factors, not physical equilibrium.
- Instincts are innate patterns of behavior and are more about evolutionary survival, not maintaining internal physiological stability.
- Drive refers to an internal state created by physiological needs (like hunger or thirst) but it is the result of imbalance, not the equilibrium itself.
Thus, the options that do not denote internal physiological equilibrium are:
\[
\boxed{{(A) Intrinsic motivation, (C) Instincts, (D) Drive}}
\]