Final answer:
The nonrestrictive clause in the sentence 'The college cafeteria, which is free for all full-time faculty, is a popular and safe environment for students to study' is 'which is free for all full-time faculty'.
Explanation:
In the sentence given, the nonrestrictive clause is: 'which is free for all full-time faculty'. This clause is nonrestrictive because it provides additional information but is not essential for the meaning of the sentence. It is set off by commas to indicate that it can be removed without changing the core meaning of the sentence.
Learn more about nonrestrictive clause in English grammar here:
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