I think its b more complicated
Id think there r any stanzas in the poem and tbh there really isnt any repitition and the last part idk how to answer but ik the first two so i hope this helped
Homophones sound the same but do not have the same meaning.
Shark : fish :: koala : bear
At least I think it is because a shark is a fish so I guess a koala is to bear.
I hope I helped :)