Which example best illustrates intrinsic motivation?

The example that best illustrates intrinsic motivation is when a student reads books on dinosaurs to learn more about them. Intrinsic motivation refers to engaging in an activity for the inherent satisfaction and interest in that activity, rather than for some external reward or consequence. In this case, the student's motivation to read about dinosaurs stems from a genuine desire to acquire knowledge and a personal interest in the subject, highlighting the importance of internal drive in fostering learning and engagement.

In contrast, the other examples represent extrinsic motivation, where actions are taken to achieve an external reward or avoid a negative outcome. Completing a homework assignment to earn a reward, studying hard to avoid being grounded, and participating in a talent show for fun may involve enjoyment but are primarily driven by external factors rather than a deep, intrinsic interest in the activities themselves.