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: Damming a river can cause something with fresh water to form. 
Question: What is the thing that is created by damming a river made of?
Fresh water.

Fact: Thyroxine increase the rate of metabolism in cells throughout the body. 
Question: What increases the rate of metabolism in cells throughout the body?
Thyroxine.

Fact: Blueberries can be eaten as a preserved food still with antioxidant benefits. 
Question: Which of the following  has the most antioxidant benefits for the body?

preserved blueberries.