Which geographical feature is prominent in North Dakota?

The Great Plains is the prominent geographical feature in North Dakota, characterized by its vast, flat landscapes and rolling hills. This region is part of the larger Great Plains area that stretches across several states in the central United States, including the undulating prairie and grassland ecosystems. These plains are crucial not only for agriculture but also for unique wildlife habitats.

While the Badlands in South Dakota are known for their striking geological formations and rugged terrain, they are not located in North Dakota. The Appalachian Mountains and the Rocky Mountains are major mountain ranges in the eastern and western United States, respectively, and are not present in North Dakota. In contrast, the Great Plains is integral to North Dakota's identity, history, and economy, making it the correct answer.