The energy generated in stars is because of

radioactivity

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nuclear fission

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nuclear fusion

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photo electric phenomenon

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Solution

The correct option is C nuclear fusion
Energy is produced in a star's center, where pressures are enormous and temperatures reach 27 million°F (15 million°C). This causes nuclear fusion—atoms of hydrogen are ripped apart and fuse (join) to form helium. These reactions release vast amounts of energy, which makes the star shine.

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