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: decomposition increases amount of organic matter in dirt. 
Question: What increases amount of organic matter in dirt?

Answer: decomposition.


Question: Fact: prokaryotes can make proteins. 
Question: what can make proteins?

Answer: prokaryotes.


Question: Fact: memory cells help keep people from getting sick. 
Question: What helps keep people from getting sick?

Answer:
Memory cells.