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: loud noises can be dangerous. 
Question: What can loud noises be?
[A]: dangerous.


[Q]: Fact: Energy enters ecosystems from the sun. 
Question: The sun contributes what to ecosystems?
[A]: energy.


[Q]: Fact: cactuses respond to daily and seasonal cycles and to disease. 
Question: what responds to daily and seasonal cycles and to disease?
[A]:
cactuses.