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: Plants photosynthesize during the day but not during the night. 
Question: Plants do what during the day but not during the night?
answer:
photosynthesize.


question:
Fact: Irradiating food can be used to kill something that causes fermentation in the food. 
Question: Irradiating food can be used to kill what in the food?
answer:
Something that causes fermentation.


question:
Fact: The number of rings along with scion, nutrition and other factors affect the overall health of a tree. 
Question: What can be checked along with nutrition and scion that can help determine health of a tree.?
answer:

the number of rings.