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

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

The location of an object in a frame of reference is called position.
The location of an object in a frame of reference is called what?

Goosebumps happen(s) when mammals raise their hair with tiny muscles in the skin.

What happens when mammals raise their hair with tiny muscles in the skin?