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Which consequence arises when iron-56 forms during stellar nucleosynthesis?

A)Neutron flux inside the core increases
B)The star's luminosity rapidly decreases
C)Fusion reactions within the core cease
D)Core temperature enters runaway positive feedback

💡 Explanation

Fusion stops because iron-56 has the highest nuclear binding energy per nucleon, therefore no energy is released by fusing iron; further fusion would require energy input rather than energy release, inhibiting hydrogen fusion.

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