metropolitan area - choose a jigsaw puzzle to solve

A metropolitan area , sometimes referred to as a metro area or commuter belt, is a region consisting of a densely populated urban core and its less-populated surrounding territories, sharing industry , infrastructure , and housing . A metro area usually comprises multiple jurisdictions and municipalities: neighborhoods, townships, boroughs, cities , towns, exurbs, suburbs, counties, districts, states, and even nations like the eurodistricts. As social , economic and political institutions have changed, metropolitan areas have become key economic and political regions. Metropolitan areas include one or more urban areas, as well as satellite cities , towns and intervening rural areas that are socioeconomically tied to the urban core, typically measured by commuting patterns . In the United States , the concept of the metropolitan statistical area has gained prominence. For urban centres outside metropolitan areas, that generate a similar attraction at smaller scale for their region , the concept of the regiopolis and respectively regiopolitan area or regio was introduced by German professors in 2006. In the United States , the term micropolitan statistical area is used.