Why was Timbuktu known as
a “Center of Learning"?

He was the center of learning because the Sankoré mosque is located, known as the Sankoré quarter, became associated with learning. He taught and inspired others to study and teach.

Explanation:

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.

was the answer correct?