Read the sentence below and complete the instruction that follows.
Constellations, groups of stars, provide astronomers with a roadmap of the galaxy.
Identify the appositive or appositive phrase.
groups of stars
Constellations
with a roadmap
astronomers
Constellations, groups of stars, provide astronomers with a roadmap of the galaxy.
Identify the appositive or appositive phrase.
groups of stars
Constellations
with a roadmap
astronomers