How are the Rocky Mountains a formal region?

The Rocky Mountains are considered a formal region because they share specific physical characteristics, such as their geological formations, elevation, and climate. This mountainous area is defined by its distinct topography, which includes rugged peaks and deep valleys, creating a recognizable landscape. Additionally, the Rockies extend across multiple states and provinces, providing a consistent and identifiable natural boundary. These shared attributes contribute to the Rocky Mountains' classification as a formal region in geography.