The literary device that Dante uses in these three lines to enhance the reader's understanding of Cerberus is imager. Option C is correct.
Imagery is the name given to the elements in a poem that spark off the senses. Even thought "image" can be a synonym for "picture", images not necessarily have to be only visual; any of the five senses can respond to what a poet writes.
Three passages were on the slab. The top was hieroglyphics, the middle was Egyptian (demotic) and the bottom was Greek. The only one that could be translated at first was the Greek. Scholars were able to translate it to French.