Answer:
a. Intrinsic motivation
Step-by-step explanation:
Intrinsic motivation: The term intrinsic motivation is defined as an individual's behavior that is being led or driven by internal rewards. An individual experiencing intrinsic motivation include behaviors that satisfy him or her internally and naturally.
Examples: An individual learns to play football because he or she wants to play not because he or she sees another person playing.
In this question above, Shane's choice of profession is guided by intrinsic motivation.