A drainage basin, also known as a watershed or catchment area, is a region where all the water that falls as precipitation drains into a common outlet, such as a river, lake, or ocean. It includes all the land and waterways that contribute to the flow of water in that specific area. The boundaries of a drainage basin are defined by topography, such as hills or mountains, which direct the flow of water. Drainage basins play a crucial role in the water cycle by collecting rainwater and snowmelt, which then flows into streams and rivers. They help manage water resources, support ecosystems, and influence local climates. Understanding drainage basins is essential for effective water management and environmental conservation.