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: Nails prevent injury by forming protective plates over distal ends. 
Question: Nails prevent injury by forming protective plates over what ends?

Answer: distal.


Question: Fact: smoking cigarettes decreases stamina. 
Question: what decreases your stamina when you smoke it?

Answer: cigarettes.


Question: Fact: A balance is used for measuring the aspect of an object that is measured in kilograms. 
Question: Which measuring unit might be used when using a balance?

Answer:
kilogram.