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: Plants exhibit phototropism, or growing toward the sun or artificial light. 
Question: What is called when plants grow toward the sun or an artificial light?
[EX A]: phototropism.

[EX Q]: Fact: smoking cigarettes decreases stamina. 
Question: what decreases your stamina when you smoke it?
[EX A]: cigarettes.

[EX Q]: Fact: the atmosphere is needed by living things. 
Question: What is needed by living things?
[EX A]:
The atmosphere.