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A is the answer because you need to draw the attention of the reader
Constellations, groups of stars, provide astronomers with a roadmap of the galaxy.
Answer:
groups of stars
Explanation:
Groups of stars is a nonrestrictive <u>appositive phrase</u> that provides additional information about the noun <em>Constellations</em>. It is set off with commas because the information it provides is not necessary for identifying the noun it describes.
Answer:
Im pretty sure the answer is 600 dollars.
Explanation:
I did the math, if im wrong though please tell me. But i hope i helped.