In a good cartoon，/ the artist can tell in a few lines / as much as a writer can tell in half a dozen paragraphs. / The cartoon artist not only tells a story / but he also tries to persuade the reader to his way of thinking. / He has great influence on public opinion. / In a political campaign, he plays an important part. / Controversial issues in Congress or at meetings of the United Nations / may keep the cartoon artist well- supplied with current materials. / A clever cartoon artist may cause laughter / because he often uses humor in his drawings. / If he is sketching a famous person，/ he takes a prominent feature and exaggerates it. / Cartoon artists, for instance, / like to lengthen an already long nose and to widen an already broad grin. / The artist uses such exaggeration to put his message across.