At the Seattle aquarium, these spiny sea animals(sea urchins) eat sea plants therefore, they are classified

phylum Echinodermata and they are omnivorous animals and therefore eat both plant and animal matter.

phylum Echinodermata and they are omnivorous animals and therefore eat both plant and animal matter.

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.

could you go a bit more in depth with you question? it's quite hard to understand. as soon as you do that i will be glad to : )