instruction:
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.
question:
Question: When do female reproductive organs mature? Answer: at puberty
answer:
Female reproductive organs form before birth. However, they do not mature until puberty.

question:
Question: Animals can not produce their own food making them _________. Answer: heterotrophs
answer:
Animals are a kingdom of multicellular eukaryotes. They cannot make their own food. Instead, they get nutrients by eating other living things. Therefore, animals are heterotrophs .

question:
Question: What combines with rain to form acid rain? Answer: nitrogen and sulfur oxides
answer:
Courtesy of the U. S. EPA. Nitrogen and sulfur oxides combine with rain to form acid rain . Public Domain.