Which animal is least closely related to this North American mammal?

The mountain goat, is a hoofed mammal endemic to North America. A subalpine to alpine species, it is a sure-footed climber commonly seen on cliffs and ice.

Despite its vernacular name, it is not a member of 'Capra', the genus that includes all other goats, such as the wild goat, from which the domestic goat is derived. The mountain goat is an even-toed ungulate of the order 'Artiodactyla' and the family 'Bovidae' that includes antelopes, gazelles, and cattle.

Both male and female mountain goats have beards, short tails, and long black horns, 15–28 cm (5.9–11.0 in) in length, which contain yearly growth rings. They are protected from the elements by their woolly white double coats. The mountain goat's feet are well-suited for climbing steep, rocky slopes with pitches exceeding 60°, with inner pads that provide traction and cloven hooves that can spread apart. The tips of their feet have sharp dewclaws that keep them from slipping. They have powerful shoulder and neck muscles that help propel them up steep slopes.

The mountain goat inhabits the Rocky Mountains and Cascade Range in the Western Cordillera of North America, from Washington, Idaho and Montana through British Columbia and Alberta, into the southern Yukon and southeastern Alaska.

Mountain goats are herbivores and spend most of their time grazing, including grasses, herbs, sedges, ferns, mosses, lichens, and twigs and leaves from the low-growing shrubs and conifers of their high-altitude habitat.