1) The document analyzes several horror movie posters, examining how they use visual elements to convey key themes and generate fear/suspense.
2) Techniques discussed include use of dark colors, ambiguous images that leave questions unanswered, and symbolic elements (like blood or a skull) that represent violence or death without showing it directly.
3) An effective horror poster typically uses visual symbols and compositional techniques to trigger viewers' imaginations and imply threats or a sense of unease relating to the film's plot, without explicitly revealing spoilers.