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: Flames convert chemical energy into light and heat energy. 
Question: What do flames convert chemical energy into?
answer:
light and heat energy.


question:
Fact: cross-pollination increases biodiversity. 
Question: What increases biodiversity?
answer:
cross-pollination.


question:
Fact: Without meristems, roots couldn't lengthen or widen. 
Question: Where does lengthening and widening occur in plant roots?
answer:

meristems.