Answer:
Migration from cold place to that place with moderate temperature.
Explanation:
Nomadic travelers in Central and East Asia used skin of animals in order to survive harsh conditions of the tundra because the skin of animals is warm that helps them to survive in that cold climate. These nomadic travelers migrate from one place to another in search of pastures for their animals and settle on that place where climate is favorable so this way they survive the harsh conditions of tundra.
