Llama meat sold at the market in Tilcara (Argentina)

In the high lands of south america, llama are livestock, they are just used the same way cows or sheep are used in other places. They cannot use cows or sheep because those animals cannot live above 3,000 m (10,000 feet) elevation. So they use llamas.

Llamas produce wool, and they are eaten as meat, just like cows and other animals we routinely eat. There are plenty of llamas, they have been domesticated for thousands of years and are not threatened by extinction. They are just considered "livestock".