The light and heat that come on the surface of earth from the sun start as:

radiant energy.

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thermal energy.

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nuclear energy.

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electrical energy.

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fission reactions.

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Solution

The correct option is C nuclear energy.
Sun is a bundle of hydrogen fusing to helium. This nuclear fusion reaction is the source of all energy that sun possesses, and resultantly is the source of energy of all life forms. This nuclear fusion energy gets radiated out of the Sun as radiant energy.
Hence correct answer is option C.

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