Every winter, Alice notices that the monarch butterflies seem to disappear from her backyard garden. Then, the butterflies return to her garden each spring.Which best describes the butterflies’ behavior?

The monarchs leave the garden in winter and return in spring, which is migration: seasonal movement from one region to another. Changes in environmental conditions, such as colder temperatures and shorter days, act as external stimuli that prompt this movement. Therefore, the best choice is migration as a response to an external stimulus.

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