The part of the northern U.S. boundary with Canada that forms a 1,300-mile (2,100-km) line along 49° north latitude, from Lake of the Woods to the Strait of Georgia, is an example of a physical boundary.

Question

Quizplus · Accepted Answer

A boundary along a line of latitude, such as the 49th parallel, is a geometric or artificial boundary, not a physical one, which would be defined by natural features like rivers or mountains.

The Part of the Northern U