Why is India considered as a sub-continent? Elaborate your answer. (UPSC 2021)

India is called a sub-continent because it is a large, distinct landmass within Asia, separated by strong physical barriers and a unique natural system. It has the scale, diversity and internal unity of a continent in miniature.

• Geological identity: India lies on the Indian Plate, once part of Gondwana, which drifted north and collided with Eurasia. This created the Himalayas and an active seismic zone.
• Physical isolation: The Himalayas, Karakoram, Hindu Kush and Purvanchal hills separate it from the rest of Asia, while the Indian Ocean, Arabian Sea and Bay of Bengal bound it on three sides.
• Climatic unity: The Himalayas block cold Central Asian winds and help produce the monsoon system, giving the region a common climate pattern.
• Diversity and scale: It includes mountains, plains, plateaus, deserts, coasts and islands, along with immense cultural and linguistic diversity.

Thus, India is a sub-continent because it is geographically separate, geologically distinct and large enough to form a self-contained natural and human region.