Answer:
Brown I am and much admired. Many horses have I tried. Tire a horse and worry a man, tell me this riddle if you can. What am I?
I have hands but cannot clap. What am I?
What goes up and down, but does not move?
I am needed for most animals and hardcover books. What am I?
I cause involuntary movements in your vehicle
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.