Question

sort each characteristic as defining a restrictive or nonrestrictive clause.
adds detail but not needed
set apart by punctuation
essential to the sentence
needed to maintain meaning
not set apart by punctuation
not essential to the sentence
restrictive
nonrestrictive

Explanation:

Restrictive clauses are essential to clarify the noun they modify; they are required for the sentence's core meaning and do not use separating punctuation. Nonrestrictive clauses provide extra, non-essential detail that can be removed without breaking the sentence's core meaning, and they are set off by punctuation like commas.

Answer:

Restrictive:

• essential to the sentence
• needed to maintain meaning
• not set apart by punctuation

Nonrestrictive:

• adds detail but not needed
• set apart by punctuation
• not essential to the sentence