Answer:
I am quick when I'm thin. I am slow when I'm fat. Wind is my worst nightmare. What am I?
I am always hungry I must always be fed. The finger I lick will soon turn red.
I can wave my hands at you but I never say goodbye. You are always cool when with me even more so when I am high!
I am lighter than air, but a hundred people cannot lift me. Careful, I am fragile. What am I?
I have cities but no houses I have mountains but no trees I have water but no fish. 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.