Which option shows responsible use of resources?

Correct answer: Using leftover material properly

The direct answer is Option A: using leftover material properly. Resources such as water, electricity, money, time and raw materials are limited, so responsible use means avoiding waste and using what is available carefully. Step by step: leftover material still has value; using it again reduces the need to buy or collect new material; less new material means less waste and less pressure on nature. Option A is correct because it shows reuse and conservation. Option B is wrong because allowing water to run wastefully uses a valuable resource without need. Option C is wrong because unnecessary electricity consumption wastes energy and may increase environmental harm. Option D is wrong because throwing usable material away causes avoidable waste. The key exam idea is: responsible resource use means reduce, reuse and avoid waste. Remember: “Use wisely, reuse fully, waste less.”