Ключевые слова: animal, animal art, animal home, burrow, burrowing, cavity, clay, den, dig, dirt, earth, earth bed, earth tunnel, ecosystem, forest, habitat, humus, landscape, layers, mammal, mammal home, meadow, moisture, mole, natural, nature, network, organic, passage, passageway, plant, rodent, root, roots, sediment, small, soil, soil bed, soil core, soil layers, strata, substratum, subterranean, terrain, texture, tunnel, underground, vegetation, wildlife,