Which line in this excerpt from jonathan swift’s a modest proposal uses the rhetorical device of irony?

Swift uses a rhetorical technique called sarcasm

Explanation:

i think it could possibly be b

(you didn't attach a copy of the poem, but i'm answering as best as i can)

since a simile compares two unlike things using like or as, it kind of gives an item the ability to do something it can't.

example: "the player was like a tiger on the field"

in this sentence, the simile conveys the idea that the player was fast and strong, like a tiger.