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.

[EX Q]: Fact: pie charts are circle graphs. 
Question: Which is a circle graph?
[EX A]: pie chart.

[EX Q]: Fact: Starfish lack respiratory and excretory systems. 
Question: What is an example of an animal that lacks a respiratory and excretory system?
[EX A]: Starfish.

[EX Q]: Fact: changes in the DNA information are essential for evolution to occur. 
Question: What is essential for evolution to occur?
[EX A]:
changes in DNA information.