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Which change is an example of a response to a stimulus?

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1 point
(1) The pupil of an eye decreases in size in bright light.
(2) A leaf absorbs sunlight in the morning.
(3) The water level of a pond rises on a rainy day.
(4) A dead tree decays after many years.

User Chevel
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Answer: (1) The pupil of an eye decreases in size in bright light.

Explanation: When the light hits the eye, it stimulates the pupil to contract.

User Tenshi Munasinghe
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