Explanations:The Himalayas are the world's highest mountain range and are divided into several sub-ranges based on their geographical location and the rivers that define their boundaries. The Assam Himalayas, also known as the Eastern Himalayas, are a significant part of this vast mountain system. They are located in the northeastern part of India and are bounded by the Tista River to the west and the Dihang River to the east.
The Tista River originates in the Himalayas and flows through the Darjeeling district of West Bengal and the Jalpaiguri district of West Bengal before entering Bangladesh. The Dihang River, also known as the Siang River, is a major tributary of the Brahmaputra River and originates in Tibet. These two rivers are crucial in defining the geographical boundaries of the Assam Himalayas.
The Assam Himalayas are part of the broader Eastern Himalayan region, which includes parts of India, Bhutan, and Nepal. This region is known for its rich biodiversity, including a wide variety of flora and fauna. The unique geographical features of the Assam Himalayas, such as the deep valleys and high peaks, contribute to the diverse ecosystems found in this area.
It is important to understand the geographical boundaries of the Himalayan ranges to correctly identify the specific sub-range in question. The Assam Himalayas are distinct from other Himalayan ranges such as the Kumaon Himalayas, which are located in the western part of the Himalayas, primarily in Uttarakhand, and the Himachal Himalayas, which are located in the western part of the Himalayas, primarily in Himachal Pradesh. The Punjab Himalayas is not a recognized term for a specific part of the Himalayas.
Therefore, the correct answer is the Assam Himalayas, as they are the part of the Himalayas that lies between the Tista and Dihang rivers.