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: Roots will decay is the conditions for growth aren't favorable. 
Question: What will decay is the conditions for growth aren't favorable?

Answer: roots.


Question: Fact: Mammals took advantage of an asteroid impact. 
Question: What took advantage of an asteroid impact?

Answer: mammals.


Question: Fact: Shrews generate the most heat by keeping their metabolic rate high. 
Question: What metabolic rate does a shrew have?

Answer:
High rate.