1) Genre refers to any category of literature, art, or other cultural works based on stylistic criteria. Film genres help audiences choose films and include categories like horror, thriller, science fiction, and fantasy. 2) Horror films aim to elicit fear, disgust, and horror through disturbing and supernatural scenes. They often overlap with fantasy and science fiction genres. 3) Common conventions in horror films include masked killers, blood, death, ghosts, demons, and haunted houses. Visual styles like shadows, low lighting, and musical cues are used to build suspense and atmosphere.