Correct Answer: (d) Japan
Solution:Kanto plain is a highly developed, urbanized, and industrialized plain of Japan. The Kantō Plain is situated in the Kanto Region of central Honshu, the main island of Japan. It's the largest plain in Japan, covering an area of approximately 17,000 square kilometers (6,244 square miles). The plain is home to the Tokyo Metropolitan Area, which is the largest urban agglomeration in the world. It includes major cities like Tokyo, Yokohama, Kawasaki, and Chiba, forming a major industrial and urban hub. The Kantō Plain is a center for both light and heavy industries, with a concentration of manufacturing along Tokyo Bay. It is also a major agricultural area, though not self-sufficient in food production for its large population. The plain consists of a series of plateaus divided by shallow river valleys, with a slight overall tilt towards the Tone River and Tokyo Bay. The plain has experienced extensive groundwater withdrawals for water resources and human induced disasters such as land subsidence in the process of urbanization.