thriller conventions - how is a thriller a thriller?

Thriller is a genre litereature and film. There are many sub genres of thrillers, the main wons that everyone will know are crime, mystery and supernatural. The main featurs of a thriller is tension and suspense this helps keep the aduience at constant cliff hangers and at the edge of their seat, and keeping them watching. Usually thrillers are a mystery threwout the film until the end to keep the audince guessing and interested. some people may get slightley mixed up with horror and thrillers, recently they have combined slightley more than ever.