Explanations:The Himalayan mountain system is a complex geological formation that consists of several parallel ranges. These ranges are categorized into different layers based on their altitude and geological characteristics. The term "Duns" refers to the longitudinal valleys that are found between certain layers of the Himalayas.
The Himalayas can be divided into several main ranges, including the Himadri (or Great Himalayas), the Himachal (or Lesser Himalayas), and the Shiwalik (or Outer Himalayas). Each of these ranges has distinct features and plays a significant role in the overall structure of the Himalayan system.
The Himadri, also known as the Great Himalayas, is the highest range and includes some of the world's tallest peaks, such as Mount Everest. Below the Himadri lies the Himachal, which is a lower range that includes the Pir Panjal and Dhaula Dhar ranges. The Shiwalik range is the outermost and lowest range of the Himalayas, consisting of a series of parallel ridges and valleys.
Between the Himachal and Shiwalik ranges, there are longitudinal valleys known as Duns. These valleys are important geographical features that provide fertile land for agriculture and habitation. The Duns are typically characterized by their flat or gently sloping terrain, which makes them suitable for human settlement and farming.
It is important to understand the geographical layout of the Himalayas to correctly identify the location of Duns. The Duns are not found between the Himadri and Himachal ranges or between the Himadri and Shiwalik ranges. They are specifically located between the Himachal and Shiwalik ranges, which is why Option A is the correct answer.
Understanding the geographical features of the Himalayas is crucial for students studying geography, particularly those preparing for competitive examinations such as the UPSC, SSC, and State PSC. The correct identification of Duns and their location between the Himachal and Shiwalik ranges is a fundamental concept in the study of Himalayan geography.