Which phrase best indicates the passage's main Idea? A recent report revealed that about 70 percent of American silent films are lost. With the arrival of talking films in the 1920s, silent films became unprofitable. So film studios threw away most of them. Some films were saved, but many of them were later lost in fires caused by the nitrate In film reels. Several other films were destroyed when they were recycled for their metal content.

invention of the washing machine

in the past, people used sticks and stones or scrub boards to clean their clothing. as it was sweaty, backbreaking work, we owe a world of to james king because he created the model for the modern washing machine in 1851. the most important issue was that this machine cleaned clothes while a person cranked the handle. doing this made people who used it develop strong muscles in their arms. later, in 1908, alva j. fisher created an electric washing machine named thor. this one was not the first automatic washing machine. however, it was one of the most popular models at the time.