Why horse have four legs
For more stability. If you think about their environment it is not a completely level ground and if one leg looses its footing there are 3 more to support their weight
Because they'd look pretty stupid with two,
Because they have a huge body to support...how old are u?
same reason people ask stupid questions
why question nature it their deal with it
why you question gods creation
Because they can't walk without legs :p i.e they have 4 legs. ;)
the laws of nature did it
Horses are huge mammals , and need all four legs to help hold up their heavy weight. Plus they cant balance on 2 :)
the same reason that why human have 2 legs ..
So to run faster than you!
To lift their body :)
because theyre giant