One reason is that it shows that it is a part of the rhyme scheme and the other reason is that it highlights the significance of light. Hope this helps!
The archetype of the cruel tyrant, exemplified by Dionysius, affects the story because
Damon and Pythias is a Greek legend that tells the story of two friends who believe in truth, honesty, and loyalty. When faced to dead by the tyrant Dionysius, they don't doubt to maintain their principles and to be loyal to each other.
C because it gives the vibe of the paragraph and extra description