The correct answer is Option 4. Explanation & Key Takeaways: • The Himalaya Frontal Fault separates the Shivalik Range from the Great Plains of northern India, which is also known as the Indo-Gangetic Plains. • The Shivalik Range is a low mountain range located at the southern foothills of the Himalayas, while the Great Plains are a vast alluvial plain that stretches across northern India, Pakistan, and Bangladesh. • The fault zone is characterized by intense seismic activity and has been responsible for several major earthquakes in the region over the past century. Related Concepts: • The Small Himalaya is a mountain range that is part of the larger Himalayan mountain system. • It is located south of the Great Himalaya Range, and it runs parallel to it for much of its length. • The Small Himalaya extends over a distance of approximately 1,500 km from the east to the west, covering parts of Nepal, Bhutan, and northern India. • The Central Himalayas is a region in the Himalayan mountain range that stretches across the northern parts of India, Nepal, and Bhutan. • It is located between the eastern and western Himalayas and is characterized by its high peaks, glaciers, and deep river valleys. • The Central Himalayas region includes several important mountain ranges, such as the Dhauladhar Range, the Pir Panjal Range, and the Mahabharat Range. • The Great Himalayas is the highest mountain range in the world, located in South Asia, spanning over 2,400 km (1,500 mi) across five countries: Bhutan, India, Nepal, China, and Pakistan. The range is home to the world's highest peaks, including Mount Everest, K2, and Kangchenjunga.