instruction:
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 a population suddenly gets much smaller the effects are unpredictable. 
Question: What is the effect of a population suddenly getting much smaller?
answer:
it is unpredicatbale.


question:
Fact: when the seasons change from summer to autumn, the amount of daylight will decrease. 
Question: What decreases when the seasons change from summer to autumn?
answer:
daylight.


question:
Fact: arteries are pressure regulated. 
Question: what are arteries?
answer:

pressure regulated.