Answer:
The more you take, the more you leave behind. What are they?
I only exist when you are here. Where you never were I can never be.
What gets bigger when more is taken away?
I have hands but do not hold, teeth but do not bite. Feet I have but they are cold, eyes I have but without sight. What am I?
I have a straight back and sharp teeth to cut objects.
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.