Introduction:
The north-south extent of India appears bigger than the east-west extent due to various geographical and geological factors. This phenomenon can be explained through the following points:

1. Shape of the Indian Subcontinent:
- The shape of the Indian subcontinent is elongated from north to south, resembling a triangle.
- The northern part of India is wider compared to the eastern and western parts, which gives the impression of a larger north-south extent.

2. Himalayan Mountain Range:
- The mighty Himalayan mountain range stretches across the northern part of India, acting as a natural barrier between India and its neighboring countries such as China and Nepal.
- The Himalayas are one of the tallest mountain ranges in the world, with numerous peaks exceeding 7,000 meters.
- The presence of these massive mountains further accentuates the north-south extent of India.

3. River Systems:
- India is blessed with several major rivers, such as the Ganges, Brahmaputra, and Godavari, which primarily flow from north to south.
- These rivers have carved deep valleys and plains along their course, contributing to the elongation of the north-south extent.
- The river systems also facilitate the movement of water and sediment, shaping the landscape over millions of years.

4. Plate Tectonics:
- The Indian plate, on which India rests, is moving slowly northwards and colliding with the Eurasian plate.
- This ongoing tectonic process has resulted in the formation of the Himalayas and the upliftment of the northern region.
- The east-west extent of India is relatively limited due to this collision, whereas the north-south extent is more pronounced.

Conclusion:
In conclusion, the north-south extent of India appears bigger than the east-west extent due to the shape of the Indian subcontinent, the presence of the Himalayan mountain range, the flow of major rivers from north to south, and the plate tectonics that have shaped the landscape. These factors contribute to the elongation of the north-south extent, making it visually more prominent.