Answer:
Odysseus’s men are compared to caught fish, showing their helplessness.
Step-by-step explanation:
A metaphor is a literary technique that is used to make comparisons between things. Unlike the simile, a metaphor need not use "like" or "as" to make comparisons between things.
In the given passage, the comparison is between the men, Odysseus's men, and fishes. Like caught fishes, the men were caught by Scylla, "dangling high overhead [. . .] rip[ped] it from the surface to dangle wriggling through the air". Thus, the men are metaphorically compared to fishes caught by a fisherman.
Thus, the correct answer is the last option.