The geographical area known for diversified agriculture and urban cities in India is the Gangetic Plain. This fertile region, formed by the alluvial deposits of the Ganges River, is one of the most agriculturally productive areas in the world. It supports densely populated urban centers, including cities like Delhi, Lucknow, and Patna. The Gangetic Plain is renowned for its rice, wheat, and sugarcane production, and it plays a crucial role in India's economy and food security.