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.

Explanation:

A non - restrictive relative clause is separated by commas and is not essential to the core meaning of the sentence. Here, "where her parents went on their first trip together as a married couple" is separated by a comma. It begins with the relative pronoun "where", has a subject ("her parents") and a verb ("went"). Removing it would still leave the main idea of the sentence ("Alma plans to visit London and Paris") intact. A restrictive relative clause is not separated by commas and is necessary for the sentence's meaning.

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.