Answer:
The more you work the more I'll eat.You keep me full I'll keep you neat.
You heard me before and then again. Afterward I die until you call me again.
What is that you will break even when you name it?
I’m white; perfect for cutting & grinding. For most animals I am a useful tool.
I have green hair a round red head and a long thin white beard.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.