Question

which statement describes a response to external stimuli?
a rabbit runs away from a fox that is chasing it
a boy eats food when he is hungry
a woman drinks water when she is thirsty
a person yawns when oxygen levels in the blood are low

Explanation:

An external stimulus is a trigger coming from outside an organism. The fox chasing the rabbit is an external factor, while hunger, thirst, and low blood oxygen are internal bodily states.

Answer:

a. a rabbit runs away from a fox that is chasing it