What is an appositive?

-A word that describes a verb.
-A word that describes a noun.
-A word that describes another word.
-All of the above.

http://www.chompchomp.com/terms/appositive.htm

So C, got it.

http://www.grammar-monster.com/glossary/appositive_apposition.htm

C is not right. I'm sorry you didn't understand the website I posted for you.

An appositive is a word or phrase that renames or describes another word in a sentence. It gives more information about the noun or pronoun it is describing. So, the correct answer is "A word that describes another word." An appositive can provide additional details, clarifications, or emphasize the main idea of the noun it is referring to. To identify an appositive in a sentence, look for a word or phrase that follows a noun or pronoun and adds more information to it.