Answer:
My Aunt Meena, a nurse in a busy hospital, is from California.
Step-by-step explanation:
An appositive is a noun that renames another noun. An appositive phrase consists of an appositive and its modifiers.
In this sentence, the appositive phrase 'a nurse in a busy hospital' renames the subject of the sentence 'My Aunt Meena'.
This is a nonrestrictive appositive phrase. It is set off with commas because the information it provides is not necessary for identifying the noun it describes (My Aunt Meena).