Question

Sun is the ultimate source of energy justify the statement

Answer 1

Yes sun is the ultimate source of energy that is solar energy. Plants make their food by the help of sunlight, and this food gives us energy. Sunlight gives us Vitamin D which makes our bones strong.
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Answer 2

Yes as plants get energy from Sun (photosynthesis)and then herbivore eat them getting that same energy then carnivore eat them and get that same energy then they are eaten by omnivores and at sheen die that same energy becomes soul that is manure or compost again used again by plants so ultimate energy is sun