Expository documentaries converse straight to the viewer, often in the form of an authoritative commentary using voiceover or titles, proposing a robust argument and standpoint. These films are rhetorical, and take a look at to persuade the viewer. (They may make use of a prosperous and sonorous male voice. https://josuezipxd.therainblog.com/32132034/detailed-notes-on-documentary-films