Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.

[EX Q]: Fact: all cells have cellular material inside the plasma membrane. 
Question: what has cellular material inside the plasma membrane?
[EX A]: all cells.

[EX Q]: Fact: proteins contain genes. 
Question: what do proteins contain?
[EX A]: genes.

[EX Q]: Fact: The breasts develop during the period when humans become sexually mature. 
Question: What happens during the period when humans become sexually mature?
[EX A]:
Breasts develop.