"Name a theatrical style that emphasizes a historical approach to the subject and uses an episodic structure. It also uses devices like songs and signs to interrupt the action of the play to create emotional distance."

Epic theatre

Explanation:

Epic theatre is a form of didactic drama presenting a series of loosely connected scenes that avoid illusion and often interrupt the story line to address the audience directly with analysis, argument, or documentation. The main focus of Epic Theatre is around teaching the audience something hence the interruption of the story line to drive home the main idea of the drama.