It s the creation, if you will, and biologists divide it into three great organizational levels, and they are illustrated, too, and are illustrated here: Ecosystems, comprising shallow marine water environments, as illustrated, mangrove, rain forests, savannah, and so on, ecosystems;
(biologists; divide; it; into three great organizational levels) (they; are illustrated; too)
biologists they
divide are illustrated
it into three great organizational levels
too