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: An item's weight causes its gravitational force. 
Question: The weight of an item causes its what?

Answer: gravitational weight.


Question: Fact: A thing arranged in clusters mostly contain instructions for a single protein. 
Question: How often does a thing arranged in clusters contain instructions for a single protein?

Answer: mostly.


Question: Fact: glass can protect plants from cold. 
Question: What can protect plants from cold?

Answer:
glass.