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: Complex chemistry occurs in cells. 
Question: What occurs in cells?
complex chemistry.

Fact: a drum has a vibrating movement. 
Question: what has vibrating movement?
drum.

Fact: Touch can be used to determine if something is undesirable. 
Question: What of the six senses can be used to determine desirability?

Touch.