According to aristotle, “the . . metrical arrangement of the words” refers to diction song thought plot

The best answer to fill in the blank would be A) Diction because diction means the choices of words and so this is the narrator's word style/choice of how they use their words to send a message or help the reader.

Here is your

Your answer is A diction!

Reason: Diction is a choice of words (a group) and phrases in a writing which could be a poem, essay, novel, or story! Also its not song because songs have words but its not really a arrangement its not plot because plots are problems or situations in a story that affects the main character or someone related to the main character maybe a friend, parent, brother, sister,etc and when it came down to rather diction or thought I choose diction because thoughts have words as the saying a picture is worth a thousand words but it also it not mention as a arrangement!

Your answer is A.