Question

in which stage does a star spend most of its time?
a main sequence
b red giant
c white dwarf
d supergiant

Explanation:

Stars spend the majority of their lives in the main - sequence stage, where they fuse hydrogen into helium in their cores. This stable phase can last billions of years depending on the star's mass. Red giants, white dwarfs, and supergiants are later stages in a star's life cycle with much shorter durations compared to the main - sequence stage.

Answer:

A. main sequence