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?
What can run but never walks licks but never talks has a bed but never sleeps has a mouth but never eats?
I can be in your body but never on your placemat. I'm always better when I'm fresh, but you'll never see me in the flesh. What am I?
you can throw me away but I will always be coming back
I build up castles. I tear down mountains. I make some men blind, I help others to see. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.