Boys who mature and girls who mature are more likely than other adolescents to feel subjective distress and emotional difficulties with the transition to adolescence.

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.

Correct answer is: - elites