Coastal plains are flat, low-lying areas located near coastlines, formed by the accumulation of sediment from rivers and ocean waves. They often feature rich soil, making them ideal for agriculture and supporting diverse ecosystems. These regions can be found in various parts of the world, including the Gulf Coast of the United States and the Eastern Seaboard. The climate in coastal plains is typically mild, with warm summers and cool winters. They are often characterized by wetlands, marshes, and estuaries, which provide habitats for numerous species. Coastal plains play a crucial role in protecting inland areas from storms and flooding.