What are actions citizens should do called?

The map shows latitudes and longitudes of australia. which australian city is located north of the 15°s latitude? perth brisbane melbourne darwin

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.

Which of the following is an example of an iron triangle?