Which is the best way to describe the biodiversity of an area? A grassland has organisms that live on hundreds of acres of land. A desert has 10 species of animals that can survive dry conditions. A rainforest has fertile soil that supports many kinds of plants. A pond has 12 species of organisms, including 300 animals and 40 plants.

Either the third or fourth one. Most likely the last one

You can do

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.