Throughout history, there are numerous examples of art being used to help people who were illiterate. How has art historically impacted people who lacked the ability to read and write?

Sorry about the calculator and me asap me asap because for real like some no one answers question one for me so that's why i'm posting them over to that way someone can at least answer number two or one for me if you do you so much if you do it would be a complete big blessing to me