Answer:
I am heavy forward, but backward I'm not. What am I?
I am an object which is used in baseball during the day I can't be seen at all
I am alive without breath and cold as death. I am never thirsty but always drinking. What am I?
My rings are not worth much, but they do tell my age. What am I?
you cannot keep me until you have given me
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.