Ключевые слова: animal, biology, class, classification, community, component, concept, connection, diagram, division, earth, ecology, ecosystem, education, educational, element, environment, environmental, example, explanation, fish, graph, graphic, hierarchy, illustration, infographic, kingdom, labeled, layers, levels, life, living, mammals, management, nature, ocean, organism, outline, overall, population, primary, rank, scheme, scientific, species, system, underwater, wildlife,