Group of stars.
An appositive or appositive phrase renames a noun or pronoun that is right beside, specifically after, it. It is usually used to provide additional information, like a definition or clarification. In this sentence, "group of stars" is defining "constellations" making it the appositive phrase.
Answer:
a is most interactive
Explanation:
interactive=influencing or having an effect on each other
b,c, and d have something in common which is nothing having to do with the audience.
That first option INTERACTS with the audience
<span>At the incident scene, The Public Information officer handles media inquiries.</span>
To inform readers about how the coral reefs are being destroyed
