Question

read the sentence.
alma plans to visit london and paris, where her parents went on their first trip together as a married couple.
what best describes the underlined part of the sentence, and why?
○ it is a restrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is not necessary to the meaning of the sentence.
○ it is a nonrestrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is necessary to the meaning of the sentence.
○ it is a restrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is necessary to the meaning of the sentence.
○ it is a nonrestrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is not necessary to the meaning of the sentence.
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Explanation:

The underlined clause starts with the relative pronoun "where", refers to the specific, already clear locations (London and Paris), and adds extra non-essential information about the parents' trip. Nonrestrictive relative clauses provide additional, non-required details and use commas to set off the clause; removing it does not change the core meaning of the main sentence (Alma still plans to visit London and Paris).

Answer:

It is a nonrestrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is not necessary to the meaning of the sentence.