Question

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

Answer 1

the correct answer is : groups of stars

Answer 2

The answer is A: group of stars

The words group of stars have the function of providing information about constelations, explaining what constalations are. When a word or a phrase have this function in a sentence, they are called appositive or appositive phrase, and they should appear between commas as those used in the example.