Question

edison and popular culture
1 every time we play recorded music or go to the movies, we enjoy the benefits of thomas edisons genius and hard work. although edison is perhaps most famous for his light bulb, his inventions in sound recording and motion pictures helped give rise to the entertainment industry as we know it today.
2 after his successful development of the first tinfoil phonograph in 1877, edison and his researchers made countless improvements to the phonograph, constantly striving to achieve the finest sound reproduction possible. at first, edison thought the phonograph primarily suitable only for
what is the main focus of the text?
what edisons contributions to music and motion picture technology were
why edisons music and motion picture inventions are his most remarkable
how edison combined sound with motion picture technology

Explanation:

The text first mentions Edison's contributions to sound recording (phonograph) and motion pictures (helping give rise to the entertainment industry). Then it elaborates on the phonograph development. So the main focus is on his contributions to music (through phonograph - sound recording) and motion picture technology. The second option about "most remarkable" is not emphasized (the text just says he's famous for the light - bulb but focuses on other inventions). The third option about combining sound and motion pictures is not the main point (the text mainly lists contributions, not the combination process).

Answer:

what Edison's contributions to music and motion picture technology were