Which of these is required for amending the United States Constitution?

Which physical feature minimizes population density in northern africa?

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.

U.s. history 1.documentary analysis what steps did taylor’s family take to prepare her freedom