Final answer:
Circe is considered a temptress because she possesses magical powers and enchants Odysseus' men, turning them into animals.
Step-by-step explanation:
Circe is considered a temptress because she possesses magical powers, which she uses to enchant Odysseus' men and turn them into animals. This is shown in the story when Odysseus and his crew arrive on Circe's island and she offers them hospitality. However, she then gives them a drink that turns them into pigs. Her power to manipulate and deceive others is what makes her a temptress.