Why do all ethnic minorities live in the mountains?

Reason 1: The living environment in mountainous areas is difficult and there are few natural people, so they become ethnic minorities. Later, I felt that all ethnic minorities lived in the mountains;

The second reason: the topography of Yunnan-Guizhou-Sichuan is mountainous, and people there naturally have no right to choose the environment, so they naturally become people living in mountainous areas.

The third reason: the economic life of ethnic minorities is generally based on hunting and nomadism, because unlike the farming ethnic groups, they need flat places to facilitate farming. Therefore, mountainous areas are also suitable for the life and production methods of ethnic minorities;

Supplement: There is no logical relationship between ethnic minorities and mountains, and many ethnic minorities live on endless grasslands, such as Mongolians and Kazakhs. So the questioner's question is actually not very accurate. I hope the answer will help you!