Leaders are excited and enthusiastic about their vision and clearly communicate it to their subordinates.

in what process is there a multiple choice answer?

answer; the best answer is (demand);

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.