Answer the following questions based on the article Sand Dunes: More Than Giant Heaps of Sand. Use complete sentences. What important role do sand dunes play?
How can sand dunes be saved?
How can sand dunes be rebuilt?
What would happen if the sand dunes in an area were destroyed?

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.