I'm sorry, but you forgot to provide the paragraphs...
The correct option is D.
From the excerpt given above, it can be seen that two different plays were discussed and the common factors between the two plays,which make the plays to be similar are the two characters who featured in the two films. The two characters had both appeared in previous plays before where they play minor roles but in the stories discussed above they both play the major characters.
Answer:
It establishes the rhythm of a duet to echo the song.
Explanation:
Parallelism refers to the use of the same grammatical structures in a series of sentences. Most of the time, parallelism is used in order to provide a sense of rhythm to the text. In this case, parallelism provides a sense of rhythm that is meant to echo the song, as it reminds the reader of a duet. As the song is also meant to be a duet (father and mother) the structure of the text highlights the subject matter.