TASK DEFINITION: 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.
PROBLEM: Fact: Nails prevent injury by forming protective plates over distal ends. 
Question: Nails prevent injury by forming protective plates over what ends?

SOLUTION: distal.

PROBLEM: Fact: a polar bear requires extremely low humidity. 
Question: what does a polar bear require?

SOLUTION: extremely low humidity.

PROBLEM: Fact: Another potential threat to the environment is the potential release of anthrax. 
Question: If anthrax were released, what would suffer?

SOLUTION:
the environment.