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.

[Q]: Fact: gases from burning coal causes precipitation which pH is 5.7 or lower. 
Question: Gases from what causes precipitation where the pH is 5.7 or lower?
[A]: burning coal.


[Q]: Fact: If something is black then it absorbs all different wavelengths of light. 
Question: If something is what, then it absorbs all different wavelengths of light?
[A]: black.


[Q]: Fact: Most mollusks have protective of bony armor. 
Question: Most mollusks have what?
[A]:
protective bony armor.