This answer is to the point: they don't. I have no idea where you heard that, but it is nearly impossible - there would be an enormous amount of science involved, science that is much more advanced than we are today. I won't go into great detail, but it has to do with genetics - DNA and chromosomes and the like.
Uh, if they didn't breed, how are they supposed to have more sea horses? Yes, sea horses breed.
Yes, tigers will certainly eat horses.
Black is a color and not a breed. Appaloosa horses can be black.
All horses can cross breed with each other.
by how they move ...... they run fast ...... that's all
yes.
There are many mixed breed horses. Many people will breed 2 types of horses that are specialized in one area to get a horse that is even better at that one thing. There are many mixed breed horses where you cannot tell all the breeds in it. They call those horses "grade" horses.
If you are a licensed breeder and have a stock of horses to breed from yes. The horses have to be studs though
Horses, they are more like horses
Pinto is a color not a breed. Paint horses are a breed of pinto marked horses. So therefore a pinto colored horses habitat will vary considerably.
Tiger Horse is the name of a specific coloration and pattern. These horses are appaloosa-spotted, on their coats. They are not a cross between horses and tigers, which is genetically impossible. The "Tiger Horse" is mostly associated with gaited horses, and the extinct-but-being-reconstructed Spanish Jennet breed.
Usually. The breed in America is usually the American Mustang.