Read the sentence below and complete the instruction that follows. A white dwarf, a dense dead star, burns through its hydrogen before it can grow into a supernova. Identify the nonessential appositive phrase.

An appositive is a noun phrase that renames or explains another noun. In the sentence, “a dense dead star” renames “A white dwarf,” so it is the appositive. It is nonessential because the sentence would still identify the subject without it.

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