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.

Fact: food contains organic molecules. 
Question: What does food contain?
Organic molecules.

Fact: humans require energy for growth. 
Question: what requires energy for growth?
humans.

Fact: Animals like cyptosporidium are often classified on how they move. 
Question: How can animals like cyptosporidium be classified?

how they move.