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← ScienceWhich risk increases when stellar proton-proton fusion declines?
A)Increased stellar core helium accumulation✓
B)Suppressed CNO cycle reaction rates
C)Increased neutrino production rates
D)Accelerated stellar core crystallization
💡 Explanation
Increased stellar core helium accumulation occurs because decreased hydrogen fusion via the proton-proton chain causes less H to be converted into He, therefore core helium builds up, rather than being consumed by heavier element fusion processes which require higher temperatures.
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