The correct answer is: Lahaul and Spiti.
Yaks are a type of cattle that are native to the high altitudes of the Himalayas. They are well-adapted to the cold and dry climate, and they are an important part of the culture and economy of the region. Yaks are used for their meat, milk, and wool, and they are also used as pack animals.
Lahaul and Spiti is a district in Himachal Pradesh that is located in the high Himalayas. It is the most sparsely populated district in India, and it has a very cold and dry climate. Yaks are an important part of the economy of Lahaul and Spiti, and they are used for their meat, milk, and wool.
The other options are incorrect because they are not located in the high Himalayas. Kinnaur is a district in Himachal Pradesh that is located in the lower Himalayas. Mandi is a district in Himachal Pradesh that is located in the middle Himalayas. Sirmaur is a district in Himachal Pradesh that is located in the lower Himalayas.