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: Digestion is the process of breaking down food proteins into energy or heat. 
Question: What is the process of breaking down food proteins into energy or heat?
answer:
digestion.


question:
Fact: Bulbs require electrical energy to see in darkness. 
Question: Bulbs produce electrical energy to what?
answer:
see in darkness.


question:
Fact: A bulb requires electrical energy to produce part of the electromagnetic spectrum. 
Question: A bulb requires electrical energy to produce part of what kind of spectrum?
answer:

electromagnetic.