Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Q: Question: What do we call the seasonal movement of animals? Answer: migration

A: Monarch butterflies gather in large groups as they migrate 2,500 miles south each fall. They return to the north in the spring. This migration is a cycle that repeats every year.
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Q: Question: What determines how strongly an atom attracts electrons to itself? Answer: electronegativity

A: The electronegativity of an atom determines how strongly it attracts electrons to itself.
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Q: Question: What type of roads and parking lots prevent rainwater from soaking into the ground? Answer: paved

A:
Paved roads and parking lots prevent rainwater from soaking into the ground. This increases runoff and the potential for soil erosion.
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