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: the stomach acidity helps digest fats. 
Question: What helps digest fats?
answer:
stomach acidity.


question:
Fact: Fungi eat dead matter such as leaves. 
Question: What do fungi do to leaves?
answer:
Eat them.


question:
Fact: Some plants have a water storage system in their stem. 
Question: Where do some plants store their water?
answer:

In their stem.