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: animals cannot make their own food. 
Question: What cannot make their own food?
animals.

Fact: In the puberty stage is a time of significant mental, emotional and social change. 
Question: What is a time of significant mental and emotional change?
puberty.

Fact: Cars and busses are used for transportation. 
Question: What are busses used for?

Transporting humans.