Amain sequence star becomes a after it uses up the hydrogen in its core. a. nebula c. black hole b. supernova d. giant select the best answer from the choices provided a b c d

a. nebula

A nebula is a mist of particles, particularly and ionized gases hydrogen and helium. Basically, the word was adopted to represent any distributed gigantic object, comprising galaxies across the Milky Way. Andromeda Nebula was sometimes also known as part of the Andromeda Galaxy which re[present a gigantic mist of hydrogen.

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explanation:

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c.

worked constantly and gave many sincere speeches about the importance of independence