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.

Ex Input:
Question: What is solid water that forms when water vapor undergoes deposition? Answer: frost

Ex Output:
Frost is solid water that forms when water vapor undergoes deposition.

Ex Input:
Question: Differences in fitness among different members of a population can lead to what kind of selection? Answer: natural selection

Ex Output:
Natural selection occurs when there are differences in fitness among members of a population.

Ex Input:
Question: Amoebas and paramecia are examples of what? Answer: protozoa

Ex Output:
Examples of protozoa include amoebas and paramecia.