An area of flat low-lying land adjacent to a seacoast near the Atlantic Ocean and Gulf of Mexico is called?

An area of flat low-lying land adjacent to a seacoast near the Atlantic Ocean and Gulf of Mexico is called a coastal plain. These regions typically feature sandy or marshy landscapes and are characterized by their proximity to water bodies, making them vulnerable to flooding and erosion. Coastal plains often support diverse ecosystems and are important for agriculture and urban development.