Which state is NOT one that borders Mexico?

Maine is the correct answer because it is located in the northeastern part of the United States and does not share a border with Mexico. In contrast, Texas, California, and Arizona are all states that are situated along the southern border of the United States, directly neighboring Mexico. Understanding the geography of the United States is crucial, especially regarding how states connect with international borders. Maine, being far removed from the southwestern states, exemplifies a state that does not interact with Mexico in this regard. Recognizing such geographical facts is important for comprehending the broader context of U.S. geography and international relations.