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.

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

Output: 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.

Input: Consider Input: Question: Which is larger: the human sperm or the human egg? Answer: human egg

Output: A human sperm is a tiny cell with a tail. A human egg is much larger. Both cells are mature haploid gametes that are capable of fertilization. What process is shown in this photograph?.

Input: Consider Input: Question: Which theory explains how materials can collide and become new materials? Answer: collision theory
Output: Collision theory explains how materials can collide and become new materials.