What is the purpose of a sump pump?

The purpose of a sump pump is primarily to remove excess water from basements. In areas prone to flooding or where groundwater levels are high, sump pumps are installed in a sump pit at the lowest point of a basement to automatically pump out accumulated water. This feature is crucial for preventing water damage, mold growth, and maintaining the structural integrity of a building. By effectively lowering the water level in the sump pit, the pump helps keep the basement dry and protects it from moisture-related issues. The other options focus on different aspects of water management, but they do not accurately capture the specific function that a sump pump serves.