This document analyzes and compares different styles of documentaries. It discusses David Attenborough's documentary on sloths, which uses participatory and educational techniques like talking over shots to engage the audience and add context, as well as humor to add depth. It also examines the observational style of "The Only Way Is Essex" reality show, which uses shot reverse shot and following characters to make the audience feel like they are part of the conversation. Finally, it discusses the expository style of "Secret Life of Motorway", which exposes informative details on motorways through stock footage, music from the era, interviews, and ads to analyze and provide opportunities for audience thought.