* Noun: This is the most common use. "I enjoy reading comics." Here, comics refers to the printed medium itself.
* Adjective: "The artist created comics illustrations." Here, comics describes the type of illustrations.
* Verb: "The artist comics about superheroes." Here, comics means to create or draw comics. (This usage is less common).
So, the part of speech for "comics" is determined by its function in the sentence.