In the map, the Southwest Native American cultural region is shown in orange. In this map, the region is located in the Southwest of the U.S. which includes modern states such as Arizona, New Mexico, and Texas. Additionally, the region extends to the south of the United States, which is now Mexico. It is possible to know this because, in the second map, the territory of the U.S. is highlighted and if you compared the highlighted zone to the orange zone in the first map, the orange zone includes territory that is not part of the U.S. Thus, the correct answer is Mexico.
