Step 1: Understanding the Concept:
Motivation is the internal or external drive to perform an action.
Intrinsic motivation comes from within (personal joy), while extrinsic motivation comes from external factors (rewards or avoiding punishment).
Step 2: Detailed Explanation:
(A) Enjoying the subject is an internal drive (Intrinsic).
(B) Exercising for health is often considered intrinsic or self-determined motivation.
(C) Working to get a prize, money, or praise is an external influence. This is the definition of extrinsic motivation.
(D) Personal satisfaction is a result of internal fulfillment (Intrinsic).
Step 3: Final Answer:
Option (C) describes an action driven by external validation or tangible gains, making it extrinsic.