A polder is a low-lying area of land that has been reclaimed from a body of water, such as a lake or sea, and is protected by dikes. This land is typically below sea level and is drained using pumps and canals to keep it dry. Polders are commonly found in countries like the Netherlands, where they play a crucial role in land management and agriculture. The creation of polders involves significant engineering efforts to control water levels and prevent flooding. Once drained, these areas can be used for farming, housing, and other purposes. The management of polders is essential for maintaining the balance between land use and water safety in regions prone to flooding.