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: All cnidarians live in water. 
Question: All cnidarians live in?
water.

Fact: Any surface that has not been sterilized will produce substances that are toxic. 
Question: What will produce substances that are toxic?
a surface not sterilized.

Fact: Most frogs breathe with gills as larvae and with lungs as adults. 
Question: What breathes with gills as larvae and with lungs as adults.?

Frogs.