Advertising has become part of modern life. In short, it refers to the activity of     1     a product of service. In other words, it tries to persuade people to buy a product or service. The history of     2     has always been closely linked with that of the mass media. As media channels have grown in number and type,     3     have advertisements. Because the mass media reaches so many people, it is a perfect vehicle for advertisers. In addition to    4     people aware of a product or service, a successful advertisement will also create a desire to buy, thus boosting business. Based on the psychology behind creating a desire to buy, advertisers have developed ways of persuading people into purchasing their products or services. A common technique to make an impact is to create a memorable    5    .