Genre theory is used to categorize films based on stylistic criteria. Genres help audiences identify different types of films and cater to their expectations. Narratives describe a sequence of events and follow common story structures identified by theorists like Propp and Todorov. Representation in media involves intentionally constructing artificial versions of reality. Audience theory considers how audiences interpret and are influenced by media texts. Research and planning are required to systematically develop knowledge and create goals for making a horror film, such as analyzing films and planning elements like plot, characters, and locations.