Concept:Rainwater harvesting aims to recharge groundwater by allowing rainwater to seep into the ground, not to store it directly for immediate use.Explanation:Rainwater harvesting can be done by collecting rooftop rainwater or letting water go directly into the ground from roadside drains. The main goal is to store water underground to increase groundwater levels. Storing rainwater in tanks and using it directly without filtration is not ideal because rooftop water contains dirt. The best method is to let it seep underground, where it can be drawn later through pumps. Statement B says it is best to store rainwater in tanks and use directly, which is incorrect because direct use without filtration is unsafe and the primary purpose is groundwater recharge.Answer:B. It is best to store rainwater in tanks and use directly.