Final answer:
Most people live in the Interior Lowlands Province, a flatland region in the central United States characterized by fertile soils and a landscape formed by the activity of glaciers and rivers.
Step-by-step explanation:
Most people live in an inland flatland region called the Interior Lowlands Province.
The Interior Lowlands Province is a region that covers the Midwestern United States. It consists largely of undeformed Paleozoic marine rocks, such as limestones and shales, which have been shaped over time by glaciers and rivers. While not as geologically dramatic as other areas, these flatlands host significant geological features, including large cave systems like Mammoth Cave in Kentucky.
The region's flat geography and fertile soils make it ideal for agriculture and settlement. The vast flatland areas of the central U.S., particularly the Interior Lowlands Province, stand as a testament to the region's history and natural processes. Contrasting sharply with areas such as the rocky Arctic or the Plateau region, the Great Plains, or the Eastern European Plain in Russia, the Interior Lowlands offer a unique environment characterized by its expansive, flat landscape.