During which phase of a low-mass star's life does helium shell fusion occur?

Name: During which phase of a low-mass star's life does helium shell fusion occur?
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Quizplus · Accepted Answer

Helium shell fusion occurs during the asymptotic giant branch phase of a low-mass star's life. During this phase, the star has exhausted the hydrogen fuel in its core and begins to fuse helium in a shell around the core, causing the outer layers of the star to expand and cool, resulting in a red giant phase.

During Which Phase of a Low-Mass Star's Life Does Helium