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

A electron microscope is used to see extremely small objects.
What type of microscope is used to see extremely small objects?

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?

Grounding is when you touch a charged object to the earth.

What is it called when you touch a charged object to the earth?