Explanation: The Indus River is a significant river in Asia, originating in the Tibetan Plateau and flowing through several countries, including India, where it passes through the region of Ladakh. In Ladakh, the river follows a long and straight course, which is a characteristic feature of its topography in this area. The river runs between two major mountain ranges: the Ladakh range and the Zaskar range.
The Ladakh range is a mountain range in the western Himalayas, located in the eastern part of Jammu and Kashmir. It is a significant geographical feature that forms the northern boundary of the Indus River valley in Ladakh. The Zaskar range, on the other hand, is another mountain range in the western Himalayas, located in the eastern part of Jammu and Kashmir and the northern part of Himachal Pradesh. It forms the southern boundary of the Indus River valley in this region.
The Indus River's course between these two ranges is a result of the geological processes that have shaped the landscape over millions of years. The river has carved its path through the mountains, creating a deep and straight valley. This geographical feature is important for understanding the hydrology and topography of the region, as well as for the local ecosystems and human settlements that depend on the river.
It is important to note that the other mountain ranges mentioned in the options, such as the Pirpanjal, Dhauladhar, and Shiwalik ranges, are located in different parts of the Himalayas and do not border the Indus River in Ladakh. Therefore, the correct answer is the Zaskar range, as it is the mountain range that forms the southern boundary of the Indus River valley in this region.
Understanding the geographical features of the Indus River and the surrounding mountain ranges is crucial for students studying the geography of the region, as well as for those preparing for competitive examinations that cover topics related to Indian geography and topography.