Pupils of the human expanding to dim light.

What is the stimulus, response and importance of response?

Stimulus: Dim light entering the eyes

Response: Pupils of the human expanding to allow more light to enter the eye

Importance of response: Expanding pupils in dim light allows more light to enter the eye, which enhances vision in low light conditions. This response is important for the safety and well-being of the individual as it allows them to see more clearly in environments with reduced lighting.