After spending years in the ocean,a mature salmon swims up its home river to return to its birthplace.This behavior is an example of

A) homeostasis.
B) the Yerkes-Dodson law.
C) the hierarchy of needs.
D) an instinct.

Instinct

An innate, typically fixed pattern of behavior in animals in response to certain stimuli, not learned through experience.

Homeostasis

The process by which living organisms regulate their internal environment to maintain a stable, constant condition.

Hierarchy of Needs

A theory in psychology proposed by Abraham Maslow that outlines a five-tier model of human needs, ranging from basic physiological needs to self-actualization.