Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Circannual behavioral rhythms are linked to the yearly cycle of seasons.

Answer: What type of behavioral rhythms are linked to the yearly cycle of seasons?


Question: A decline in blood flow to kidneys organs stimulates release of the enzyme renin, in turn stimulating the reabsorption of sodium and water.

Answer: A decline in blood flow to what organs stimulates release of the enzyme renin, in turn stimulating the reabsorption of sodium and water?


Question: The abundance of water makes the earth habitable for humans.

Answer:
What makes the earth habitable for humans?