Answer:
I can fall off a building and live, but in water I will die. What am I?
What force and strength cannot get through I with my unique teeth can do.
You bind me and I walk. You loosen me and I stop. What am I?
There is one in a minute two in a moment and none in a thousand years. What is it?
I tremble at each breath of air and yet can heaviest burdens bear.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.