Question

what is the initial stage of all stars?
nebula
black hole
supernova
white dwarf

Explanation:

Stars form from clouds of gas and dust called nebulae. Through gravitational collapse within a nebula, a star - forming region is created, leading to the birth of a star. Black holes are formed from the collapse of massive stars, supernovas are explosive events at the end - stage of massive stars, and white dwarfs are the remnants of low - to medium - mass stars.

Answer:

A. nebula