Demonstrative adjectives are words that modify nouns and identify a specific noun or nouns.Here is a sentence with a demonstrative adjective.<span>That tree is beautiful.</span>
This sentence clarifies any confusion and identifies a specific tree. Which tree is beautiful? That tree.
The event which is associated with the peripeteia (or turn of events) in the play is Teiresias prophecy. It changed the whole course of the drama afterwards.