Ключевые слова: alone, animal, anthropoid, ape, arm, behind, black, brown, cage, captive, captivity, despair, environment, exhibit, expression, face, facial, fence, front, funny, hair, hairy, hand, head, herbivore, intelligence, iron, jail, jungle, loneliness, mammal, metal, monkey, natural, nature, pensive, primate, prison, sad, sadness, solitude, tame, term, trapped, vertebrate, vertical, view, wild, wildlife, zoo,