All of the following regions are labeled on the map above except the .
A.
Rocky Mountains
B.
Canadian Shield
C.
Arctic Islands
D.
Great Basin

Ithink the answer is baby boomers ?

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.