Final answer:
Appositive phrases are most commonly non-restrictive and provide additional information about the noun that precedes them. Therefore, the correct answer is b) Non-restrictive.
Step-by-step explanation:
Appositive phrases are most commonly non-restrictive. An appositive phrase is a word or phrase that adds explanatory or clarifying information to the noun that precedes it. It is set off by commas or dashes and provides additional information that is not necessary to identify the noun.
For example, in the sentence 'My sister, a talented pianist, will be performing tonight,' the appositive phrase 'a talented pianist' adds more information about the noun 'my sister'.
A non-restrictive appositive provides additional information about a noun and is usually set off by commas, dashes, or parentheses. For example, in the sentence 'My brother, a skilled gymnast, won the competition,' the phrase 'a skilled gymnast' is a non-restrictive appositive that adds information about the noun 'brother.'
Alternatively, restrictive appositives are essential to the meaning of the sentence and do not require commas. An example of a restrictive appositive is 'The teacher Mrs. Smith is retiring today,' where 'Mrs. Smith' specifies which teacher.