Shannon was so hungry that she found herself unable to concentrate on her studies. The only thing she could think of was food, which made it impossible to learn the material in her textbook. She decided to leave the library and eat dinner before returning to study again. Which theories best describes Shannon's motivation to go eat dinner?

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.