The Delta region refers to an area of land formed at the mouth of a river, where it meets a larger body of water, such as an ocean or a lake. This region is characterized by rich soil and diverse ecosystems, making it ideal for agriculture and wildlife. Notable examples include the Mississippi River Delta in the United States and the Nile Delta in Egypt. Deltas are formed through the deposition of sediment carried by the river as it slows down upon entering standing water. This process creates a unique landscape with channels, wetlands, and islands. Deltas are important for flood control, water filtration, and providing habitats for various species.