Answer:
I am always hungry, I must always be fed. The finger I lick will soon turn red.
The more you have of me, the less you see. Who am I?
Which weighs more? A pound of iron or a pound of feathers?
What has been around for millions of years but is never more than a month old?
What is part of you and all around you but if it entangles you, it will kill you?
It is something you will never see again.