Which statement is not true about the srivijaya empire?
it grew wealthy by taxing trade.
its capital, palembang, became a great center of buddhist learning.
it was a mainland empire.
it included parts of java, borneo, and sumatra.

Its capital, Palembang, became a great center of Buddhist learning. I believe

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.