For this item, we are to determine the level of biological organization that is comprised of the following organisms: grass, deer, rabbits, fox, and bear. The answer to this item is Ecosystem. This is because the organisms are not coming from a single species are there should be an interaction or relationship between them in order to survive.
Grass, deer, rabbits, fox and bear all contribute to the production of a biological organisation known as an ecosystem. An ecosystem, by definition is a biological community of many organisms that interact with each other and with their environment.