👉 Subregions are geographical regions that are delimited by a common boundary line. These boundaries can be defined by land or sea, and can include both continents and islands. For example: - The United States is divided into three main subregions: the southern region, the central region, and the northern region. - The European Union is further divided into 28 member states with their own unique regions. - The Philippines is a subregion of the Greater Philippine Islands.
