What is a musk oxens habitat?

Muskox live in northern Canada and Greenland as well as in Alaska, where they were re-introduced. They were also reintroduced in northern Europe and Asia. A link is provided to the Wikipedia article on the muskox, and a map indicating its range can be found there.

Note that there are two colors on the map showing the range. One is the range of the animals where they were re-introduced, and the other color is the range of the animals prior to re-introduction Biology. It should be noted that the muskox was re-introduced into the places where it once roamed but, for whatever reasons, had disappeared.
The musk ox lives in the tundra, which is a natural biome. The tundra is a very cold biome, so the musk ox has, over the years, adapted to the conditions of the tundra.

:)