答案：Mark Twain' s narratives are distinguished for his use of local color. This may be defined as the careful attention to details of the physical scene and to those mannerisms in speech dress or behavior peculiar to a geographical locality. Twain emphatically insisted that the job of the native novelists was not to generalize the nation but to depict each of the country' s regions and peoples accurately. Only in this way the peculiarity of American experience the polyglot tongues of its people and the vastness of the continent could be captured. After the civil war a number of American writers exploited the possibilities of local color in various parts of America.Mark Twain' s narratives are distinguished for his use of local color. This may be defined as the careful attention to details of the physical scene and to those mannerisms in speech, dress, or behavior. peculiar to a geographical locality. Twain emphatically insisted that the job of the native novelists was not to generalize the nation but to depict each of the country' s regions and peoples accurately. Only in this way, the peculiarity of American experience, the polyglot tongues of its people, and the vastness of the continent could be captured. After the civil war a number of American writers exploited the possibilities of local color in various parts of America.