What are similarities between relief and elevation

Most goods that came into ancient rome traveled by what?

Analyze the responses of president franklin roosevelt's administration to the problems of the great depression. how effective were these responses? how did they change the role of the federal government

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.