Which is an example of an external response to stimuli?

a.
a rabbit running from a predator that is chasing it

b.
the body recognizing it is constantly feeling thirsty

c.
a rabbit sensing a predator is approaching

d.
getting water to drink to quench the body's thirst

An example of an external response to stimuli is D. getting water to drink to quench the body's thirst.
The stimulus is that you are thirsty. The action, or your response to that stimulus is that you get water to drink it. 

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