Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

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

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


Ex Input:
A(n) gastropods is noted for having its eyes at the tips of stalks or tentacles that emerge from its head.

Ex Output:
What type of creature is noted for having its eyes at the tips of stalks or tentacles that emerge from its head?


Ex Input:
A mold is an imprint of an organism left in rock.

Ex Output:

A mold is an imprint of an organism left in what?