In terms of a star's evolutionary life,an asymptotic giant branch (AGB)star is in the
A) helium-core-burning phase.
B) helium-shell-burning phase.
C) pre-main-sequence phase.
D) hydrogen-shell-burning phase prior to helium ignition in the core.

Question

Quizplus · Accepted Answer

An AGB star is in the phase where helium is being burned in a shell around the core, after the hydrogen in the shell has been exhausted. This occurs in the later stages of a low- to intermediate-mass star's life.

In Terms of a Star's Evolutionary Life,an Asymptotic Giant Branch