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.

Fact: Repellents can stop harm caused by flea bites. 
Question: How can you prevent harm caused by flea bites?
Using repellent.

Fact: you should look at the sun too long or you will impact your eyes negatively. 
Question: What does looking at the sun do?
Damages eyes.

Fact: cars hurt the environment. 
Question: What hurts the environment?

cars.