What are the four methods of delivery?

The four methods of delivery in public speaking are memorization, manuscript, extemporaneous, and impromptu. Memorization involves learning the speech Word-for-Word, while manuscript delivery relies on reading from a written text. Extemporaneous speaking combines preparation with spontaneity, allowing for a more natural flow, and impromptu speaking requires delivering a speech without prior notice or preparation. Each method has its own advantages and is suited to different speaking contexts.