Helium fusion within a star begins A) after all the hydrogen ...

[jparksx]

Helium fusion within a star begins
 
  A) after all the hydrogen within the star has been depleted.
  B) when all carbon has been depleted.
  C) because of the force of gravity.
  D) with the expulsion of practically all hydrogen.

Question 2

A main sequence star begins transforming into a red giant when
 
  A) helium begins fusing.
  B) helium within the core begins to expand.
  C) contracting helium causes hydrogen to fuse.
  D) hydrogen starts fusing within the core.

[rekilledagain]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: C

[jparksx]

Thanks for the timely response, appreciate it

[chjcharjto14]

Gracias!