public relations is management function that creats, develops, and carries out policies and programs to influence public opinion or public reaction about an idea, a product, or an organization. The field of public relations has become an important part of the economic, social, and political pattern of life in many nations. That field includes advertising, promotional activities and press contact. Public relations also exists at the same time in business with marketing and merchandising to create the climate in which all selling functions occur. In the paragraph, the author mainly tells us___.