Answer -
- Various rivers have divided the Himalayas into four major regional parts, which are as follows.
| Kashmir Himalaya | Kumaon Himalaya | Nepal Himalaya | Assam Himalaya |
| Between the Indus River and Sutlej River | Between the Sutlej River and Kali River | Between the Kali River and Teesta River | Between the Teesta River and Dihang River |
| 560 km | 320 km | 800 km | 720 km |
| Gradually attains height | Mainly in Uttarakhand | In Nepal, Tibet, Sikkim and West Bengal (Darjeeling) | In Tibet, Sikkim, Bhutan, Arunachal Pradesh and Assam |
| Widest (250-400 km) | Major glaciers from which India's major rivers originate, e.g. Ganga from Gangotri | Width is very less but height is greater | Height starts decreasing again + width is the least |
| Ranges Zaskar, Pir Panjal, Dhauladhar etc. | Nanda Devi, Kamet, Trisul, Badrinath, Kedarnath | Mount Everest, Kanchenjunga, Makalu, Dhaulagiri, Annapurna etc. | Namcha Barwa, Kula Kangri, Chomolhari (Jomolhari), Pohudri etc. |
| Passes - Zojila, Burzila, Baralacha etc. | Highest peak -Nanda Devi |