Answer:
Who eats a lot of iron without getting sick?
What contains zero calories, but if you consume it, you will probably gain weight?
A house of wood in a hidden place. Built without nails or glue. High above the earthen ground. It holds pale gems of blue.
What is that which, though black itself, enlightens the world without burning?
Both punishment and sweet reward, It will befall both fool and lord. It is a spiritual scoreboard, Your every deed it does record.
What language does a billboard speak?