Final answer:
Michigan is the state that consists of two peninsulas, the Lower and Upper Peninsulas, which are distinctive features that set it apart in the U.S.
Step-by-step explanation:
The state that is composed of two peninsulas, the upper and lower, is Michigan. The Lower Peninsula is often referred to as the mitten-shaped peninsula due to its appearance, whereas the Upper Peninsula is connected to it by the Mackinac Bridge and is known for its forested terrain and rugged landscape.
Michigan's unique geographical features make it distinct in the United States.