Explanations:The Ganga-Brahmaputra delta, located in the eastern part of India, particularly in West Bengal, is one of the most fertile regions in the world. This delta is formed by the confluence of the Ganges and Brahmaputra rivers, which deposit rich alluvial soil, making the land highly suitable for agriculture. The region experiences a tropical monsoon climate, characterized by high rainfall and warm temperatures, which are conducive to the growth of various crops.
Among the crops grown in this region, jute stands out as a major cash crop. Jute is a fiber crop that is primarily used for making ropes, sacks, and other coarse fabrics. The plant requires a warm and humid climate, along with well-watered, alluvial soil, which are abundantly available in the Ganga-Brahmaputra delta. The high rainfall and the rich, fertile soil provide the necessary conditions for jute to thrive, making it a significant crop in the region.
Other crops such as tea, cotton, and maize are also grown in different parts of West Bengal, but they are not the primary crops of the Ganga-Brahmaputra delta. Tea is more commonly cultivated in the Darjeeling and Jalpaiguri regions, which have a cooler climate and higher altitudes. Cotton, on the other hand, requires a drier climate and well-drained soil, which are not typical of the delta region. Maize is grown in various parts of India, but it is not a major crop in the delta area.
Therefore, the correct answer is jute, as it is the crop that is most suited to the climatic and soil conditions of the Ganga-Brahmaputra delta in West Bengal. The region's unique environmental factors make it an ideal location for jute cultivation, contributing significantly to the local economy and agricultural output.