2. describe the following geographical regions of the mayans: a. yucatan peninsula: b. northern lowlands: c. central lowlands: d. southern lowlands: e. northern highlands: f. southern highlands: g. pacific coastal plan:

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.