This question is based on MARRIAGE OF ANANSEWA. What style of performance influences the structure of the play?

The performance style that influences the structure of The Marriage of Anansewa is Anansesem - the traditional Akan spider-tale storytelling tradition of Ghana. Efua Sutherland deliberately modelled her play on this indigenous oral performance form.

Anansesem (literally "spider stories") features a storyteller who interacts directly with the audience, incorporates songs and choral responses into the narrative, and uses audience participation as an integral part of the performance. Sutherland adapts all of these elements: the play includes a narrator figure who addresses the audience, songs that punctuate and comment on the plot, and moments that break the fourth wall to draw the audience into the story.

The play is not structured as classical tragedy (which follows Greek conventions of hubris, hamartia, and catharsis), realism (which seeks lifelike representation without direct audience address), or epic theatre (Bertolt Brecht's distinctly Western tradition, which, while sharing certain devices like breaking the fourth wall, is a different theatrical movement with different political aims). Sutherland's innovation was to bring a distinctly Ghanaian storytelling tradition onto the modern stage.