Linked from
The 36 pages that link to Horse, each with the reason it gives.
PerissodactylaBroader topic: The horse is the most extensively domesticated living perissodactyl.
CursorialityBroader topic: Horses combine elongated limbs with high-speed terrestrial locomotion.
EquidaeBroader topic: Horses are the most extensively domesticated living members of the family.
EquusBroader topic: It is the best-known domesticated member of Equus.
NeckBroader topic: Its neck supports a large head while allowing grazing and broad head movement.