the main reason for the deforestation of the amazon rain forest is

a)
the need for housing.

b)
the need to drill for oil.

c)
the need to clear land for gold mining.

d)
the need for pasture land for livestock.

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.