It would be interesting to train a horse to do certain things when asked by me!
How do you train a horse?
It seems there are many different ways to train a horse, some are considered cruel and others ways seem a bit more gentle and humane
What can a horse be trained to do?
There are so many different things, they used to be trained for warfare, farm work, and transportation, but it is different now
How is it different now?
They have some they train for specialized jobs like movie stunt work, circus entertainment and psychotherapy! 
Oh that is amazing! Are horses hard to train?