An appositive functions as the indirect object of a verb replaces a noun or a pronoun indicates which one or what kind identifies or renames another noun or pronoun

d. Identifies or renames another noun or pronoun.

Explanation:

An appositive exemplifies a noun or a noun phrase that recognizes and defines the other noun or pronoun right beside it. It may vary from short to the long merger of words best supported by commas. It is the additional information that is provided in the sentence and non-confining as even if they are omitted from the sentence, it won't affect or alter the meaning. Some examples of appositives are given below:

1. The Statue of Liberty, the landmark of New York City, is admired all over the globe.

2. Your school friend, William Clarke, is getting married next week.