Solution: All the above features are said to be an evidence for Himalayas being young folded mountain. Deep gorges, U-turn river courses, Parallel Mountain Ranges and steep gradient causing land sliding are very common views on Himalayas. The Himalayas, one of the youngest mountain ranges in the world, are classified into four distinct types based on their geographical and geological characteristics. These are the Trans-Himalayas, located to the north of the Great Himalayas, characterised by arid landscapes and high plateaus; the Greater Himalayas (Himadri), the highest and most continuous range that hosts prominent peaks like Mount Everest and Kanchenjunga; the Lesser Himalayas (Himachal), marked by rugged terrains and famous hill stations like Shimla and Darjeeling; and the Shivalik Hills, the outermost and youngest range featuring low-altitude foothills. Together, these ranges form a natural barrier and are vital for India's climate, biodiversity, and water resources