circe sends odysseus to the underworld
Ithaca
To the land of death
[t]
She sends him to the land of the dead to talk with Tireasais
The first route Circe gives to Odysseus would send him through the Wandering Rocks. This route has only been navigated successfully one time. The rocks effectively destroy any ship that attempts to sail through them.
To send odysseus home
Athena is generally the goddess who pities Odysseus, and pleads with the Gods to send him home. Calypso also pities Odysseus when she finds him washed up on her shores, and she nurses Odysseus back to health.
He doesn't escape, he's let go. After Zeus says it's time to send Odysseus home, he describes what will happen on this last leg of the journey. Then, he send Hermes to tell Calypso it's time to send Odysseus away. She gives Odysseus some tools, they go into the forest and he builds himself a ship. She gives him some cloth, he makes sails. She supplies him and send him on his way.
In the epic poem "The Odyssey" by Homer, it is not Zeus who destroys Odysseus' ship, but rather the god of the sea, Poseidon. Poseidon's anger towards Odysseus causes him to send storms and obstacles to thwart Odysseus' journey home.
Because she wants him to make a name for himself-in other words become a man.
A owl
The Phaeacians sent Odysseus back to Ithaca thanks to their king, King Alcinous.