instruction:
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.
question:
Fact: A fertilized egg can create an offspring if it's carried until birth. 
Question: When does a fertilized egg become an offspring?
answer:
When it's born.


question:
Fact: memory cells help keep people from getting sick. 
Question: What helps keep people from getting sick?
answer:
Memory cells.


question:
Fact: using firewood for homes allows sunlight to become available to the surrounding plants. 
Question: using firewood for homes allows what to become available to the surrounding plants?
answer:

sunlight.