Yes, haven't you watched twlight
It's just how they stand. Like us, for example. We stand on two legs, and they are probably saying "Why do humans stand on two legs?" It's just like asking "Why do dogs stand on four legs?"Please recommend me!
A dog stands up with four legs and two legs
Horses use all four legs.
Not on their hind legs, no. They can stand (though for short periods at a time) on their four stout but short legs.
Generally on four legs. Upright posture is not for moving.
It just does.
Because their back legs are longer than their front. Just like humans, They have short front legs and long back legs, So that is why they are able to stand on 2 feet, BUT They cant walk they can just stand.
No giraffes do not have three legs. Giraffes have only four legs. If they did have three legs then it would probably be hard for them to walk. Let alone stand.
Mos species of dinosaur walked on 4 legs, but some, including all carnivorous dinosaurs, walked on 2 legs.
Some do. I saw it with my eyes, pretty freaking frightening.
A bed - it has one foot (the foot of the bed) and four legs (which make it stand as a bed)
Horses only have four legs... so if you meant to ask "why do horses have four legs" then the answer would be that four legs fit the horses needs the most, for example six legs would make it hard to turn and would make the horse too long. But in the same way two legs wouldn't be enough because the horse would have to stand on its hind legs and since it wasn't made for two legs the horse wouldn't be able to stand up and would fall over.