What feature makes Michigan's geography unique compared to other states?

Michigan's geography is indeed unique largely due to the number of inland lakes found throughout the state. With over 11,000 inland lakes, Michigan boasts the highest concentration of freshwater lakes in the United States. This abundance of lakes shapes various aspects of the state's environment and recreational opportunities, contributing to its tourism and outdoor activities. These lakes offer fishing, boating, swimming, and a habitat for diverse aquatic life, making them an integral part of Michigan’s natural landscape and culture.

The other options, while notable features, do not highlight Michigan’s uniqueness in the same way. While Michigan's proximity to Canada is significant for trade and cultural exchange, almost half of U.S. states share a border with another country. The state is also relatively flat in certain areas, as is true of many Midwestern states. Lastly, while Michigan has a diverse range of wildlife due to its various habitats, other states equally host rich biodiversity. The sheer number of inland lakes truly sets Michigan apart, making this feature the most distinctive aspect of its geography.