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: an animal requires food to grow and heal. 
Question: What does an animal require food for?

Answer: to grow and heal.


Question: Fact: measuring diamonds requires scratching them. 
Question: What can you scratch to measure?

Answer: diamonds.


Question: Fact: Converted sugar is used for energy by the cells of most organisms. 
Question: What is used for energy by cells?

Answer:
Converted sugar.