Albert Bandura proposed the social-cognitive perspective, which a Emphasizes the interaction of our traits with our situations b Predicts human behavior c Focuses on how our environment controls us d Describes our personality using five main traits e Explains the role of the inferiority complex in our behaviors

Sector is best defined as (part).

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.