In 332 BC, which military leader defeated the Persians and annexed Egypt to be part of his Macedonian Greek empire?

Alexander III of Macedon (Alexander the great)

Explanation:

a: social security and social programs

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.