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.
--------
Question: Fact: animals use sound to find a mate. 
Question: What do animals use to find a mate?

Answer: sound.


Question: Fact: Antihistamines can help with certain infections. 
Question: What can help with sinus infections?

Answer: antihistamines.


Question: Fact: Travelling requires a tool such as a sextant. 
Question: What is an example of a tool used for what travelling requires?

Answer:
Sextant.