how does whitmans statement reveal the values of individualism and democracy cherished by the emerging American culture

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.

Which character are always present in all living organisms

Answer the questions in the image for brainliest