As a red giant star evolves, hydrogen shell burning proceeds increasingly faster due to
A) rotational energy from the star's rapid rotation.
B) heat released from the core's contraction.
C) pressure from the contracting envelope.
D) release of energy stored in magnetic fields.
E) energy from the fusion of heavier elements.

Question

Quizplus · Accepted Answer

As the core of a red giant contracts, it heats up, which increases the rate of hydrogen shell burning around the core.

As a Red Giant Star Evolves, Hydrogen Shell Burning Proceeds