Which statement best describes a formal region?

• A. Boundaries defined by economic trade routes.
• B. Boundaries defined by population size.
• C. Boundaries defined by shared characteristics.
• D. Boundaries defined by time zones.

Answer: (C)

A formal region is defined by a shared characteristic that is relatively uniform across the area. The statement about boundaries defined by shared characteristics matches this idea best because it explicitly describes an area unified by common features—such as language, climate, religion, or other cultural or physical traits—that many places within the region share.

The other ideas describe different kinds of regions: boundaries shaped by economic trade routes point to a functional region, where the area is organized around a central function or node; boundaries defined by population size rely on counting people rather than a common trait; and boundaries defined by time zones are administrative divisions used for keeping time, not about a uniform characteristic of the inhabitants or landscape.