The flat, low-lying area near a river is called a "floodplain." Floodplains are typically formed by sediments deposited during seasonal floods, making them fertile grounds for vegetation and agriculture. These areas are vital ecosystems that support diverse wildlife and plant species. Floodplains are also significant for human activities, serving as locations for farming and development due to their rich soil. However, they are prone to flooding, which can present challenges for communities living nearby. In addition to their ecological importance, floodplains play a crucial role in managing river ecosystems and maintaining water quality.