Help esay points

Explain how a Labor Union Work
Explain how to form a Labor Union

Which word most closely describes the type of government in edward bellamy’s looking backward

Whose plan centered on keeping the federal budget balanced, instituting tax cuts, and developing public works projects?

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.