What invention most increased the influence of films in culture and society in the twentieth century?

the innovation of sound

the addition of newsreels

the cinematography

the creation of feature-length films

The invention of sound in films had the most significant impact on increasing the influence of films in culture and society in the twentieth century. Sound added a new dimension to storytelling, allowing for dialogue, music, and sound effects to enhance the viewing experience. This breakthrough made films more immersive and engaging, leading to the rise of the "talkies" and attracting a larger audience to cinemas. Sound fundamentally changed the way films were made and consumed, cementing the medium as a powerful cultural and social force.