Answer:
Iām hard as a rock and as light as a feather. Iām passed on to one another. Poor people need me and rich people have me.
I am needed for most animals and hardcover books. What am I?
I hold two people together but touch only one. What am I?
I am alive without breath and cold as death. I am never thirsty but always drinking.
I am an instrument you can hear but cannot touch or see. 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.