Answer: The appositive phrase in the sentence given is: __________________________________ "little Sierra" . ____________ Explanation: _________________________
An "appositive" refers to a "noun" or "noun phrase" that renames another noun right beside it.
______________
In the sentence given:
________________
"My neighbor, little Sierra, threw rocks through her parents' window." ; ________________________________ ,
the phrase: "little Sierra"—renames the noun: "neighbor".
_____________
As such, the phrase: "little Sierra" is an 'appositive phrase'.