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: certain Steel products have a positive impact on the environment. 
Question: certain Steel products have a positive impact on what?

Answer: environment.


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

Answer: dehydrated.


Question: Fact: wild canines use howling to warn others. 
Question: What uses howling to warn others?

Answer:
wild canines.