Question : Which non-conventional energy source depends on the sun's heat?
Option 1: Wind energy
Option 2: Tidal energy
Option 3: Geothermal energy
Option 4: Solar energy
Correct Answer: Solar energy
Solution : The correct answer is (D) Solar energy
Solar energy is a non-conventional energy source that relies on harnessing the heat and light from the sun. Solar panels or photovoltaic cells convert sunlight into electricity, and solar thermal systems use the sun's heat for heating water or air. Solar energy is a renewable and sustainable source of power that can be used for various applications, including electricity generation, heating, and powering devices.