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: 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: barometric pressure makes clear weather. 
Question: What causes clear weather?
answer:
barometric pressure.


question:
Fact: wings are part of the exoskeleton and attached behind the head. 
Question: wings are part of the exoskeleton and attached where?
answer:

behind the head.