Why does Athena put Ithaca in a fog?

Athena puts Ithaca in a fog to conceal Odysseus's arrival and protect him as he returns home after his long journey. This divine intervention allows Odysseus to approach his homeland unnoticed, giving him the opportunity to plan his next moves against the suitors who have taken over his household. By shrouding the island in mist, Athena ensures that Odysseus can safely gather information and strategize without immediate threats.