The correct option is D None of the above
Energy conservation plays a key role in today's world as we are depleting energy sources at an alarming rate. Going green by utilising alternate sources of energy like solar, wind, tidal, and geothermal, etc. would help us in saving environment from pollution as well as it gives time for the non-renewable energy sources like fossil fuels to replenish.
Thus, renewable sources of energy like solar energy and the energy from the sea in the forms of tidal, wave, and ocean thermal, could provide a problem-free path in meeting the goal of energy conservation and judicious use of energy.