WILL GIVE There is a great deal of vegetation in a rain forest because there is .

1 a lot of sunlight and water

2 a vast tundra

3 a long winter

4 a cool, dry climate

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.