What invention is Thomas Edison credited with that is related to film?

Thomas Edison is credited with the invention of the motion picture camera, which was a significant advancement in the development of film. His work in the late 19th century laid the groundwork for capturing moving images on a medium, which was essential for the evolution of cinema. Edison's inventions, particularly the Kinetoscope, allowed individual viewers to watch films through a device that used a strip of film, creating a series of moving images.

The invention of the motion picture camera itself enabled filmmakers to record and manipulate sequences of images, paving the way for narrative storytelling in film and the eventual creation of projection systems that could display films to larger audiences. This innovation was fundamental to the development of the film industry as we know it today, making it the correct answer in the context of Edison's contributions to film and cinema.