Which branch of government would be the "motor" of federal action and why this is.

Which organization provides to get information about to protect women from human trafficking the best ngo to contact would be

What was martin luther king, jr., referencing in the passage that brought him to lead a protest in birmingham?

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.