Final answer:
Circe is a witch or sorcerer in Greek mythology, and she appears in The Odyssey as one of the challenges faced by Odysseus and his men.
Step-by-step explanation:
Circe is a Greek legendary figure known for her powers as a witch or sorcerer. In the epic poem The Odyssey, written by Homer, Circe plays a significant role as one of the obstacles that Odysseus and his men must overcome on their journey back to Ithaca. Circe is encountered on the island of Aeaea, where she turns Odysseus' men into pigs. However, with the help of the god Hermes, Odysseus is able to resist Circe's magic and ultimately convinces her to release his men and provide them with guidance for their journey.