Rainwater harvesting is best described as:

• A. Rainwater Harvesting
• B. Desalination
• C. Greywater Recycling
• D. Groundwater Recharge

Answer: (A)

Capturing and storing rainfall for later use is rainwater harvesting. It involves collecting rain from catchment surfaces such as rooftops, directing it into storage tanks or cisterns, and using that stored water for irrigation, toilet flushing, washing, or even treated drinking water. This approach focuses on turning precipitation into a usable supply without relying on treated municipal water.

Desalination, by contrast, removes salt from seawater; greywater recycling reuses relatively clean wastewater from sinks, showers, or laundry after treatment; and groundwater recharge aims to infiltrate water into the soil to replenish aquifers. So the description that matches rainwater harvesting centers on capturing rain and storing it for later use.