Final answer:
Films are categorized as genres based on various aspects including theme, historical periods, and audience ratings.
Step-by-step explanation:
Films are categorized as genres based on various aspects, including theme, historical periods, and the audience ratings. Genres provide a way to classify films based on their similarities in terms of subject matter, style, and audience expectations. For example, a thriller film may have a different theme and historical period compared to a romantic comedy.