Answer:
The person who makes it sells it. The person who buys it never uses it. The person who uses it never sees it. What is it?
I tremble at each breath of air, and yet can heaviest burdens bear. What am I?
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
you can throw me away but I will always be coming back
Good memory, skin like the sea. A great beast I am, yet vermin frightens me. What am I?
Give it food and it will live, give it water and it will die.