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

Answer: barometric pressure.


Question: Fact: The crystallized rocks are made by lava from the mantle. 
Question: Where does the lava come from that makes igneous rocks?

Answer: Mantle.


Question: Fact: Smaller rocks come from the interaction of bedrock with wind over long periods of time. 
Question: Smaller rocks come from the interaction of bedrock with what over long periods of time?

Answer:
wind.