Final answer:
The Mackinac Bridge connects the upper and lower peninsulas of Michigan.
Step-by-step explanation:
The Mackinac Bridge connects the upper and lower peninsulas of Michigan. The Mackinac Bridge is a suspension bridge that spans the Straits of Mackinac, connecting the city of St. Ignace in the upper peninsula to Mackinaw City in the lower peninsula. The bridge is an important transportation route in Michigan, allowing easy access between the two peninsulas.