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: Toyota causes pollution. 
Question: What causes pollution?
Toyota.

Fact: Fossils are remnants of ancient life. 
Question: What ancient life remnants are studied?
fossils.

Fact: death can occur when cells divide more often than normal cells and grow out of control. 
Question: what can occur when cells divide more often than normal cells and grow out of control?

death.