What causes a star to move off of the Main Sequence?(1 point)

Question

Responses

It cools down in temperature.
It cools down in temperature.

It becomes too old to be a Main Sequence Star.
It becomes too old to be a Main Sequence Star.

It uses up all of its Hydrogen.

Answer 1

The correct response is: It uses up all of its Hydrogen.

As a star exhausts the hydrogen fuel in its core, it can no longer sustain nuclear fusion at the same rate, causing it to exit the Main Sequence phase of its life cycle.