Which is an example of an instinct? A rabbit hides when it observes a predator.
A dog wags its tail when it hears a doorbell ring.
A boy pulls his hand away after touching a hot surface.
A dolphin swims through a hoop during an amusement park show.

A boy pulls his hand away after touching a hot surface

Explanation:

INSTINCT MEANING: Instinct or innate behavior is the inherent inclination of a living organism towards a particular complex behavior.

The option "A dolphin swims through a hoop during an amusement park show" is absurd because dolphins are trained to do that which is not an instinct.

The option "A dog wags its tail when it hears a doorbell ring" is also not an Instinct.