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.

[Q]: Fact: birds fly using muscles in the chest. 
Question: What do birds use to fly?
[A]: Muscles in the chest.


[Q]: Fact: individual nerve cells transmit nerve impulses to other cells. 
Question: What transmit nerve impulses to other cells?
[A]: individual nerve cells.


[Q]: Fact: Macroevolution occurs very, very slowly above the level of the species. 
Question: Macroevolution occurs how above the level of the species.?
[A]:
slowly.


