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: Protective equipment is used for protecting the eyes during experiements. 
Question: What is used for protecting the eyes during experiements?
protective equipment.

Fact: parasites can cause harmful diseases. 
Question: certain diseases can be caused by what?
parasites.

Fact: Hormones cause a time of significant mental, emotional, and social changes. 
Question: What significant changes occur due to hormones?

Mental, emotional, and social.