Answer:
I saw the dead bring forth the living. I saw the living bring forth the dead. What did I see?
The more you take away from me the bigger I shall get.
I am filled with garb the price is free. Just return what you don't need.
I am heavy forward but backward I am not. What am I?
I twist and turn and leave a loop. What am I?
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.