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Which 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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