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.

[EX Q]: Fact: decomposition increases amount of organic matter in dirt. 
Question: What increases amount of organic matter in dirt?
[EX A]: decomposition.

[EX Q]: Fact: If something is black then it absorbs all different wavelengths of light. 
Question: If something is what, then it absorbs all different wavelengths of light?
[EX A]: black.

[EX Q]: Fact: fog is formed when air cools. 
Question: Fog is formed when?
[EX A]:
air cools.