I NEED ANSWERS ASAP Which statement best explains why early humans were nomads?

They were curious about exploring new lands.
Their farming methods had exhausted the soil.
They were searching for resources necessary to live.
Overpopulation made their living conditions crowded.

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.