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: movement of an air mass can cause localized damage. 
Question: What can movement of an air mass cause?
[EX A]: Localized damage.

[EX Q]: Fact: Protective equipment is used for protecting the eyes during experiements. 
Question: What is used for protecting the eyes during experiements?
[EX A]: protective equipment.

[EX Q]: Fact: travelling may require a compass. 
Question: Travelling may require a?
[EX A]:
compass.