what does it mean when a star moves off the main sequence on the h - r diagram?\nit has run out of hydrogen…

what does it mean when a star moves off the main sequence on the h - r diagram?\nit has run out of hydrogen fuel\nit is just beginning to form\nit is getting hotter and brighter\nit is turning into a planet
Answer
Brief Explanations:
On the Hertzsprung - Russell (H - R) Diagram, stars spend most of their lives on the main sequence fusing hydrogen into helium in their cores. When a star runs out of hydrogen fuel in its core, it can no longer maintain the equilibrium that keeps it on the main sequence and moves off of it.
Answer:
It has run out of hydrogen fuel