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: Using hydropower reduces greenhouse gases. 
Question: What does hydropower help reduce?
Greenhouse gases.

Fact: combining an egg and sperm increases genetic diversity. 
Question: what increases genetic diversity?
combining egg and sperm.

Fact: Some viruses have an envelope of fats and proteins. 
Question: Some viruses have an envelope of?

fats and proteins.