What was responsible for the growth of the movie industry

Hello there i would say The Rise of Radio Broadcasting Factors Responsible For the Growth of the Movie Industry Before the 1920's radio broadcast were irregular, they didn't have announcers or narrators, didn't have set openings or closings, and were not set up around a central idea. i hope i helped

The answer is ethnic groups.

Answer: tokugawa ieyasu (徳川家康, january 31, 1543 – june 1, 1616) was the founder and first shōgun of the tokugawa shogunate of japan, which effectively ruled japan from the battle of sekigahara in 1600 until the meiji restoration in 1868.