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: glass causes bending of light rays. 
Question: what does glass cause?
[EX A]: bending light rays.

[EX Q]: Fact: Monotremes lay eggs. 
Question: What is the distinguishing feature of monotremes?
[EX A]: They lay eggs.

[EX Q]: Fact: When the wiring is finished, electrical current runs through it. 
Question: When the wiring is finished, what runs through it?
[EX A]:
electrical current.