Defining the Genre and Sub Genres

The genre of the film can be quite a difficult thing to define as many movies these days are hybrids but there are four main ways to define a genre. These are:
Setting, the environment where the story takes place.
Theme, the isuue or issues that the film deals with.
Mood, the emotional tone that the film takes on.
and Finally the format, the way the film is shot.

Subgenres are when a film takes on a genre but also has other genres included in it such as a mystery can be a supernatural mystery or a psychological mystery my example of a sub genre is Jennifer's Body (2009) a dark comedy horror film directed by Karyn Kusama and written by Diablo Cody. This film could also be considered a teenage comedy as well as a high school comedy. The film plays on teenage cliches such as jocks, cheerleaders and nerds which are typically associated with high school films along with the new emerging trend in high school movies emo's. The film also has a cannibalistic demon which is a convention of a horror film. The witty dialogue is typical to teenage films of late, Juno (2007) Gilmore Girls (2000-2007) and smart people (2007).