The most accurate response regarding the differences in diction between Shakespeare and Ovid in the treatment of the story of Pyramus and Thisbe is:
Ovid uses diction that draws attention to the story’s humor.
Ovid's version presents the tragic elements of the tale with a certain lightness and whimsy, often highlighting the absurdity of the lovers' situation. In contrast, Shakespeare's rendition, while also capturing humor, imbues the narrative with more dramatic tension and poignancy, particularly through the comedic play-within-a-play format in "A Midsummer Night's Dream." This nuanced difference in diction and tone is crucial to understanding their respective interpretations of the story.