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: when the season changes  the amount of hours will change. 
Question: What happens when the season changes?

Answer: the amount of hours changes.


Question: Fact: air is required for breathing. 
Question: What is required for breathing?

Answer: air.


Question: Fact: passive immunity lasts only as long as the gammaglobulins survive in body fluids. 
Question: passive immunity lasts only as long as what survives in body fluids?

Answer:
gammaglobulins.