The merging of two or more extensive urban areas results in a?

The merging of two or more extensive urban areas results in a conurbation. A conurbation is a region comprising a cluster of adjacent metropolitan areas that have expanded and merged over time to form a continuous urban complex. The areas within a conurbation remain distinct, but they share transportation systems, infrastructure, and other resources. These regions typically contain a large population and are characterized by high levels of economic activity and social integration. Examples of conurbations include the New York metropolitan area in the United States, the Rhine-Ruhr metropolitan region in Germany, and the Greater Tokyo Area in Japan.