The document discusses different genres and subgenres of horror films. It defines horror as a genre that aims to frighten or scare audiences by inducing feelings of terror. Some common subgenres of horror discussed include psychological horror, slasher horror, zombie horror, gothic horror, and sci-fi horror. Psychological horror relies on playing on the characters' and audiences' existing fears rather than showing explicit violence or supernatural elements. Settings for psychological horror films are often places like woods, hospitals, or large houses that create a sense of realism and fear. Sounds used in psychological horror also aim to unnerve audiences rather than match what is shown on screen.