The answer to this question is d. Hope this helps!
The first one is B
I'd say the second one is A
The last one is C
<span>b. Charles; renames brother
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<span>Appositive is noun or noun phrase in which retitles, renames and helps describe the noun that is adjacent to it in the sentence. The appositive is like a more clear illustration or wants to illuminate the said subject in the statement.
<span>1. The appositive word in the sentence is the author. Which describes and renames Gary Jackson in the sentence</span> </span> <span>
2. It renames Charles Dickens.</span><span>
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I think you did really good this was a really eye opening topic really the only thing I have to say is you might want to change to summarize to to conclude it sounds more appealing other than that I don't really have any corrections.