A) USA–Canada
B) India–China
C) Argentina–Chile
D) Russia–Uzbekistan
🧠 Explanation:
The USA–Canada border is the longest international border. For geography students, this highlights political geography, a key topic in international relations, North American studies, and geopolitics. Borders define nations. Understanding this clarifies geopolitical boundaries. It’s essential for analyzing global relations. Studying the border offers insights into territorial divisions, crucial for geography and international relations.
