Question

How do stars evolve?

# plz don't answer this. ​

Answer 1

All stars are formed from collapsing clouds of gas and dust, often called nebulae or molecular clouds. Over the course of millions of years, these protostars settle down into a state of equilibrium, becoming what is known as a main-sequence star. Nuclear fusion powers a star for most of its existence

Answer 2

QUESTION

How do stars evolve?

ANSWER

because changes (whether gradual shrinking or contraction) in a star's core where fusion is occuring (or perhaps no longer occuring!) must result in changes throughout the rest of the star, including its surface.