Ключевые слова: abstract, brain, brain tree, clipart, concept, conceptual, creative, design, drawing, eco, ecological, education, environmental, genius, graphic, green, growing, growth, head, icon, idea, illustration, innovation, inspiration, intellectual, intelligence, intelligent, invention, learn, library, literature, medical, mental, mind, nature, plant, psychoanalysis, psychology, read, roots, science, symbol, teaching, thought, tree, understanding, wisdom,