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: astronauts require dehydrated food for extended flights. 
Question: astronauts require what food for extended flights?
answer:
dehydrated.


question:
Fact: Tropical cyclones convert heat energy into mechanical energy. 
Question: What converts heat energy into mechanical energy?
answer:
tropical cyclones.


question:
Fact: all organisms belong to a trophic level. 
Question: What do all organisms belong to?
answer:

Trophic level.