Movies can be categorized into genres based on their narrative elements or the emotions they elicit in viewers. Some common movie genres described in the document are: action films which feature a heroic protagonist facing dangers and challenges through violence and feats of action; animation films produced through gradually changing drawings; comedy films designed to elicit laughter through humor and exaggeration; horror films which play on primal fears using themes of the macabre and supernatural; musical films where songs are incorporated into the narrative; mystery films focusing on solving crimes or problems; romance films depicting passionate romantic love stories; and science fiction films using speculative science concepts like alien lifeforms or futuristic technologies to explore philosophical issues.