Which of the following is an example of a functional region?

A functional region is defined by a particular set of activities or interactions that occur within it and has a core that is linked to its surrounding areas. The correct answer describes a metropolitan area that includes a central city and its surrounding suburbs, highlighting the social, economic, and transportation connections that facilitate daily interactions and functions.

In this case, the central city acts as the hub, with suburbs depending on it for employment, services, and infrastructure. This creates a cohesive area where the relationships among the areas contribute to a unified economic and social system.

The other options do not reflect the concept of a functional region; for example, a large desert area does not have organized activities or interactions typical of a functional region. A state defined by government actions focuses on political boundaries rather than function and does not necessarily imply interconnectedness. A region characterized only by historical events lacks the functional relationships that define a functional region since it is based solely on past occurrences rather than present interactions.