The sentence that uses parallel structures is B) My three favorite activities are writing, reading, and going to the library.
A parallel structure means that the same form of a verb is used in a sentence, and as you can see, here only gerunds are used - writing, reading, going - they all have -ing in the end.
The other sentences don't have a parallel structure because they don't use the same forms.
It's a compound sentence because it has 'and'.
you should start it with an opinion. for example : Romeo and Juliet was the most tragic love story in history. (or if you disagree) Romeo and Juliet was the most simpleminded story ever! after that you should use some evidents to back up your claim. basic reasons why you think what you think. I hope i helped <3 (writing is sumthin dats simple for me lemme kno if u need anymore help)
