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: competition helps species survive. 
Question: What helps species survive?
competition.

Fact: Pregnancy is evidence of sperm being deposited in the vagina. 
Question: What is evident in pregnancy.?
sperm in the vagina.

Fact: a plant requires energy to grow. 
Question: What does a plant need to grow?

energy.