This website gives a really good explanation.
http://web.uvic.ca/~mbest1/engl366c2005/merchant1.html
12. <span>When an author uses a concrete object to represent an idea or emotion, it is called symbolism. The correct option among all the options that are given in the question is option "B".
13. </span>In “Babylon Revisited,” Fitzgerald choose the title to be metaphoric of Paris because <span>It represents the ruins of American "royalty" in Paris. The correct option among all the options given is option "B".
14. </span>"Babylon Revisited" is the one among the following that <span>uses allegory to symbolize something deeply spiritual or to present a moral lesson. The correct option among all the options is option "A".</span>
That sentence is an example of parallel structure.
When there is repetition of a specific grammatical form in a sentence, parallelism or a parallel structure is produced. This occurs when you mantain the same pattern for every compared word or idea in your construction. This makes the idea easier to follow by the reader.
Were you suppost to add an image??
