Answer:
I am a seed with three letters in my name. Take away the last two and I still sound the same.
Tear off my skin. I won't cry, but you will. What am I?
Poor people have it. Rich people need it. If you eat it you die. What is it?
By Moon or by Sun I shall be found. Yet I am undone if there's no light around.
I plow and plow, but never sow. What am I?
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.