Final answer:
The first movie came out in the 1890s, but the film industry began to flourish in the 1920s with Southern California, specifically Hollywood, becoming the hub of the American film industry.
Step-by-step explanation:
The first movie was released in the 1890s, but the film industry started to thrive in the 1920s.
Southern California, particularly Hollywood, became the center of the American film industry during this decade. The introduction of sound in movies in the late 1920s further revolutionized the film industry.