The figure below shows the evolutionary path of a star on the HR diagram.At which point does helium fusion begin?
A) A
B) B
C) C
D) D

Name: The figure below shows the evolutionary path of a star on the HR diagram.At which point does helium fusion begin? A) A B) B C) C D) D
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Question

The figure below shows the evolutionary path of a star on the HR diagram.At which point does helium fusion begin? 
A) A 
B) B 
C) C 
D) D

Quizplus · Accepted Answer

Helium fusion begins at the point where the star reaches the end of the horizontal branch and begins to move up the asymptotic giant branch. This point is indicated by the arrow pointing towards C on the HR diagram.

The Figure Below Shows the Evolutionary Path of a Star