This is done so that the character development is clearly shown, the length of the film can be limited and so the film can be kept interesting and engaging for the public. The film's plot is changed slightly from the novel it is based on to show character development. Some settings are overridden or changed to limit the length of the movie. The character's characteristics are slightly altered so that the film remains interesting and engaging for the audience. By changing these aspects of the film the producer is able to keep the audience engaged while showing the character