Question

joaquin tells his science class that galaxies consist o
asteroids
stars
comets
constellations

Explanation:

Galaxies are large systems of stars, along with gas, dust, and dark matter, bound together by gravity. Asteroids are small rocky bodies in the solar system, comets are icy bodies with tails, and constellations are groups of stars as seen from Earth (not the building blocks of galaxies). So galaxies consist mainly of stars.

Answer:

B. stars