Correct Answer: Collecting rainwater

Solution : The correct answer is (c) Collecting rainwater

Collecting rainwater is a method of water conservation that involves capturing and storing rainwater for later use. This practice helps to reduce reliance on freshwater sources and can be used for various purposes such as irrigation, gardening, and non-potable household uses. By collecting rainwater, especially during rainy seasons, water resources can be conserved and used efficiently, particularly in areas where water scarcity is a concern.