Answer:
I eat I live.I breathe I live. I drink I die.
A single syllable do I claim black was my most famous name; Fetal to mortals here below thousands have I slain in a single blow.
I always have to work with something in my eye.
I stand in one place yet fill the whole room. I can be filled with molten rock and come in every hue. What am I?
I am a ship that can be made to ride the greatest waves. I am not built by objects but built by minds.
No matter how little or how much you use me, you change me every month.