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: Smog is an airborne pollutant. 
Question: What is an airborne pollutant?
[EX A]: Smog.

[EX Q]: Fact: Burning fuel in furnaces can kill. 
Question: Burning fuel in a furnace can?
[EX A]: kill.

[EX Q]: Fact: Plants show phototropism, or growing toward the sun. 
Question: What is plant's tendency to grow toward the sun called?
[EX A]:
phototropism.