Which one of the following is the advantages of Rainwater harvesting ?

The following are the benefits of rainwater harvesting: It decreases soil erosion and flood threats by collecting rainfall and regulating stormwater flow to avoid urban flooding. Most rainwater harvesting systems feature a built-in catchment space on top of the roof that can gather enormous amounts of water during rainstorms. Rainwater harvesting allows for capturing rainwater to reduce the effects of drought. Rainwater is typically free of hazardous pollutants, making it acceptable for irrigation. Another significant advantage is that it raises groundwater levels and minimizes the requirement for potable water. It is critical, especially in places with poor water levels.