Here's why:
* It names a category or type: We use "genre" to identify a category of artistic, musical, or literary works (e.g., the genre of science fiction, the genre of rock music).
* It can be the subject of a sentence: "Genre" can be the main topic of a sentence, like "The genre of fantasy has become increasingly popular."
* It can be modified by adjectives: We can describe a genre with adjectives, like "the classic genre of detective fiction."
However, "genre" can also function as an adjective in some cases:
* "Genre film" refers to a film belonging to a specific genre.
So, while "genre" is primarily a noun, it can sometimes function as an adjective depending on the context.