Railroad tracks coud be made from stronger material (Steel, due to the growth of the steel industry and high production). More jobs were avaible in the automobile industry (With the growth of the steel industry, came the growth of the automobile industry and it's job availability.). Many people moved to the suburbs and drove to and from work (Due to the dissemination of automobiles, people could easily live in farther areas and drive to and from work.) The aspect of American life in the 1920s best described by the list is B. Effects of the growin steel industry.