Instinctive behavior is an inborn, unlearned pattern of action that animals (and humans) perform in response to a specific stimulus. A classic example is a fixation or fixed action pattern that occurs without prior experience. Likely answer (based on typical educational choices)

• An example of an instinctive behavior: a sea turtle hatchling instinctively heading toward the ocean after emerging on the beach, without being taught.
• Other common examples include: a newborn chick’s rooting reflex, a duckling imprinting on a parent, or a dog barking in response to a sudden threat (fight-or-flight response).

If you have a specific list of options, I can identify which one best fits instinctive behavior and explain why.