Explanation: The Indo-Ganga-Brahmaputra plains are a significant geographical feature in northern India, formed by the alluvial deposits of the Indus, Ganga, and Brahmaputra river systems. These plains are one of the largest and most fertile alluvial plains in the world, stretching from the Punjab in the west to Assam in the east. The plains are characterized by their flat terrain, rich soil, and high agricultural productivity, making them a crucial region for India's economy and population.
The Indus River, originating in the Tibetan Plateau, flows through the Punjab region, contributing to the formation of the western part of the plains. The Ganga, originating from the Gangotri Glacier in the Himalayas, flows through the northern plains of India, joining the Brahmaputra in Bangladesh. The Brahmaputra, also originating in the Tibetan Plateau, flows through Assam before joining the Ganga in Bangladesh, forming the vast delta region.
The easternmost point of the Indo-Ganga-Brahmaputra plains is Assam, a state in northeastern India. Assam is a crucial part of the plains, where the Brahmaputra River flows into the plains from the Himalayas, bringing rich alluvial deposits that contribute to the fertility of the region. The plains in Assam are characterized by their vast floodplains and the presence of numerous rivers and tributaries, which make the region highly productive for agriculture.
Understanding the geographical extent of the Indo-Ganga-Brahmaputra plains is essential for comprehending the agricultural, economic, and demographic significance of this region. The plains are not only a major agricultural hub but also a densely populated area, with a significant portion of India's population residing in this region. The correct identification of the easternmost point of the plains, which is Assam, is crucial for understanding the geographical and economic importance of this region in the context of Indian geography and development.