How did entrepreneurs like Henry ford and W. K. Kellogg help the economy?

Entrepreneurs like Henry Ford and W. K. Kellogg significantly boosted the economy by pioneering mass production techniques and creating innovative products that transformed consumer habits. Henry Ford revolutionized the automobile industry with the assembly line, making cars affordable and accessible, which spurred job creation and economic growth. W. K. Kellogg, through his cereal company, capitalized on the breakfast food market, promoting convenience and nutrition, while also creating jobs and stimulating agricultural production. Their contributions not only enhanced productivity but also shaped new industries and consumer markets, driving overall economic development.