Which would be a adaptation for a living in the tundra

two adaptions would be hibernation and migration

Insulation and Shelter

Explanation:

Shelter and insulation are the two adaptation that are required by a living organism to survive in the tundra region. These organisms are naturally designed to resist the cold, by having a blubber fat layer, that works as an insulating layer which prevents from releasing heat. The marine animals in the tundra region has this layer.

In addition to that, they need a place to take shelter because the environment is very cold and harsh in the tundra region.