Attempt the question, check the explanation, and continue with similar questions to build confidence before exams.
जल स्तर को बढ़ाकर
जल उपयोग को कम करके
जल प्रदूषण को बढ़ाकर
जल व्यवस्था को अव्यवस्थित करके
Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.