Question

examine the following sentence and then identify the rule that governs the comma. claras art project, a color mosaic of a rainbow, took first place in the weekend competition. rule 1, comma in a series rule 4, comma with appositives rule 5, comma with speaker tag rule 7, comma in compound sentences

Explanation:

The phrase "a color mosaic of a rainbow" directly renames or identifies the noun phrase "Clara's art project"—this is an appositive. Non-essential appositives (ones that add extra, non-required information) are set off from the rest of the sentence with commas, which matches the structure of the given sentence. The other rules do not apply: there is no series of items, speaker tag, or compound sentence here.

Answer:

Rule 4, comma with appositives