An appositive phrase is a phrase that "re-states" the subject (or another noun phrase), that is gives a new name or a new description.
Here the subject is "her uncle" and the new way of describing the uncle is "<span>the man over there in the red shirt</span>", which is also the appositive phrase.
The correct answer here is d. the man over there in the red shirt
I read the book, i believe she said that the situation wouldn't happen to her school.
