Final answer:
A French drain is a buried gravel pit designed to allow water to accumulate quickly and dissipate slowly by soaking into the soil. It helps prevent waterlogging in areas prone to excess water accumulation, such as basements and yards.
Step-by-step explanation:
A French drain is a buried gravel pit designed to allow water to accumulate quickly and dissipate slowly by soaking into the soil. It helps prevent waterlogging in areas prone to excess water accumulation, such as basements and yards. The drain consists of a trench filled with gravel or rock, with a perforated pipe placed at the bottom to collect and redirect the water away from the area.