Effort, skill, beautiful story
A film isn't just made by one person alone (typically) - but if you have a great team (which can consist of a number of different jobs) all of their efforts come together contributing to the result of the overall product -- and in a sense can all be like vital pieces fitting together to make a puzzle or the whole picture work. If even one aspect is off, like sound - the whole craftsmanship of the film suffers. There is a lot of art out there, but the best artwork is produced by skilled people, and people who care about their creations.
director, actors, casting director, cinematographer, set builders, prop maker, prop master, camera operators, wardrobe stylists, special effect technician, stunt coordinator