Answer:
What flares up and does a lot of good, and when it dies is just a piece of wood?
Plow and hoe, reap and sow, What soon does every farmer grow?
I have legs but never walk, I may have flowers but no soil, I hold food but never eat.
I have it, I don’t share it. If I share it, I don’t have it. What is it?
Something wholly unreal, yet seems real to I. Think my friend, tell me where does it lie?
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.