When do you use a coma?

I'll mark what are some examples of metaphors in the song "lose yourself" by eminem?

Which of the following sentences most clearly uses topical organization? a. do you have problems with mosquitoes and gnats? fabulous exterminators can ! b. we've gathered at this conference to discuss three things: poverty, war, and disease. c. killer bees have spread up from south america into mexico and the united states. d. first, gather all the painting supplies you need. next, lay them out on a work bench.

The essay sea stars by barbara hurd. what point is the author making by comparing a sea star missing an arm to a human losing a limb?