How do the Coke-Pepsi example, snack and fast food examples demonstrate both regional variation AND globalization

d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer

an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.