<span>Im pretty sure the answer would be B. Hope that helps.
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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.
B-We but half express ourselves, and are ashamed of that divine idea which each of us represents.
Self-Reliance is an essay written by Waldo Emerson, he was a philosopher that constantly wrote that the human being should follow its own ideas and be itself to its fullest. And this phrase describes him the best because he stated that we were only half us, and tried to match a concept of what society wanted us to be, and that if we conected with our innerself we could realizes how unique and divine each of us are.