Which system refers to the production style used by Hollywood from the 1920s to 1960s?

The production style used by Hollywood from the 1920s to 1960s is known as the Studio System. This system is characterized by the major film studios' control over the production, distribution, and exhibition of films. In this era, studios such as MGM, Warner Bros., and Paramount operated with extensive resources, engrossing contracts, and a stable of contracted actors, directors, and production staff.

The Studio System aimed to create a consistent product, with studios meticulously managing every aspect of filmmaking. This included everything from the development of scripts to the selection of cast and crew, and even marketing and distribution strategies. The hallmark of the Studio System was its assembly line approach, which fostered a certain formulaic style in movies produced during this time.

The other options represent different concepts or eras in film. The Independent System generally refers to films produced outside the major studios, often characterized by their artistic freedom. The Film Festival System involves showcasing films to an audience at specific festivals, which gained prominence later in film history. Cinema Paradiso refers to a famous film from the late 20th century rather than a production system. Thus, the correct answer encapsulates a distinct period and methodology in filmmaking that defined Hollywood's golden age.