posted by Imar .
How is the tone of the newspaper article different from the tone of the letter
Does this question refer to a specific newspaper article and letter? If so we would need to see the two examples to note the difference in tone.
The purpose of a news article is to inform the readers of a recent event. Typically, news articles include the 5 W's (Who, What, Where, When, Why, How) in the first two or three sentences. Then the details are filled in, more or less in order of importance in the rest of the article. So the tone of a news article is unbiased and informative.
Letters can be personal -- with a personal tone -- or business -- with the goal of imparting a specific piece of information or convincing the reader to take a particular course of action.