How do you determine the theme of a text?

It can be through adjectives, the tone/ mood of the text, context of the text, and background information of the text

Usually is the lesson that you learned from the story

the event that is is associated with the peripeteia in the play is: Teiresias prophecy Teirsesias phropecy predict that Creon will met with a tragic ending due to all of his behavior throughout his life. To find an asnwer about this, he decided to travel and find the answer through peripetia