Which would the reader get to know a character?

When grendel speaks of unferth and says "i could crush him like a fly" what literary device is being used

Could someone me with this question?

4. how does the speaker's comparison of sinners to aninsect (paragraph 7) contribute to the central idea of thetext? o a it emphasizes the negative view god has ofsinners and how inconsequential they are to him. o b it stresses the connection that exists between allof god's creatures, whether they be human orinsect. o c it suggests that sinners can change for the better, as insects are known to go throughtransformations. o d it portrays sinners as being just as prevalentaround the earth as the wide variety of insects.