instruction:
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.
question:
Fact: Roots grow away from a light source. 
Question: what grow away from a light source?
answer:
roots.


question:
Fact: chemical weathering causes iron to turn brown, red, or orange. 
Question: What does chemical weather cause iron to do?
answer:
Change color to brown.


question:
Fact: Some backboned aquatic animals have a circulatory system with a two-chambered heart. 
Question: The two-chambered heart of some backboned aquatic animals is part of their:?
answer:

circulatory system.