Question

1. our sun is an average - size star. after completing its main sequence stage, it will become a... red giant. super red giant. black hole. supernova explosion.

Explanation:

Average - sized stars like our Sun expand into red giants after the main - sequence stage as the hydrogen in the core is depleted and the outer layers expand and cool. Super red giants are for much more massive stars, black holes form from the collapse of extremely massive stars, and supernova explosions are associated with the deaths of high - mass stars.

Answer:

red giant