What forms the natural boundary between Chile and Argentina?

What forms the natural boundary between Chile and Argentina?

• A. Andes mountains
• B. Himalaya range
• C. Rocky Mountains
• D. Appalachians

Answer: (A)

Natural boundaries often follow large geographic features that create real barriers. In this region, the border between Chile and Argentina runs along the spine of the Andes mountains. The Andes are the longest continental mountain range, stretching down the western edge of South America and forming rugged terrain, glaciers, and high peaks that naturally separate the two countries. For context, the Aconcagua peak lies near this border, illustrating how the range marks the boundary in much of the area. The other options are mountain ranges located in other continents (Himalayas in Asia, Rocky Mountains and Appalachians in North America), so they do not define the Chile–Argentina border.

Natural boundaries often follow large geographic features that create real barriers. In this region, the border between Chile and Argentina runs along the spine of the Andes mountains. The Andes are the longest continental mountain range, stretching down the western edge of South America and forming rugged terrain, glaciers, and high peaks that naturally separate the two countries. For context, the Aconcagua peak lies near this border, illustrating how the range marks the boundary in much of the area. The other options are mountain ranges located in other continents (Himalayas in Asia, Rocky Mountains and Appalachians in North America), so they do not define the Chile–Argentina border.