Which state shares a border with Canada?

Maine is the correct choice because it is one of the U.S. states that shares a direct border with Canada. Specifically, Maine borders the Canadian provinces of New Brunswick and Quebec. This geographical proximity has historical significance and impacts various aspects such as trade, culture, and tourism between the two regions.

In contrast, Florida, Georgia, and South Carolina do not have borders with Canada. Florida is located in the southeastern United States and is bordered by the Gulf of Mexico and the Atlantic Ocean. Georgia and South Carolina are also southeastern states, bordered primarily by other U.S. states and the Atlantic Ocean, but neither shares a northern boundary with Canada. Understanding these geographical distinctions is essential for recognizing the significance of states in relation to international borders.