Final answer:
The geography described as flat with sandy soil and a network of rivers in North Carolina corresponds to the Coastal Plain region.
Step-by-step explanation:
If the geography around you could be described as flat, sandy soil with a network of rivers useful for transportation, you would most likely be in the Coastal Plain region of North Carolina. This region is composed of sediment that has accumulated over time and is characterized by its flat, sandy terrain and numerous waterways. The Coastal Plain spans a vast area along the Atlantic Ocean and is well-known for its wetland landscapes formed by the network of rivers and tidewater streams. In contrast, the Piedmont region is known for lower, rolling hills and the Mountains region features high mountain ranges, which does not match the flat, sandy description. Furthermore, while the Tidewater Region is associated with waterways, it is specifically tied to the coastal habitats which tend to have steeper geography, again not fitting the flat and sandy description. Therefore, the correct answer is the Coastal Plain region.