Answer:
I am a desire to munch
I have thirteen hearts but no body or soul. What am I?
You hear me speak, for I have a hard tongue. But I cannot breathe, for I have not a lung. What am I?
I break down buildings, I crumble mountains but you can't see me. What am I?
Crooked as a rainbow and slick as a plate, ten thousand horses can't pull me straight. What am I?
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.