One type of appeal that can be found in this poster is the emotional appeal (also known as pathos), which has the intention to evoke certain emotions in the audience so as to persuade them. Good examples of emotional appeals are stories and metaphors.
In this poster, the finger pointing at a person (that could be the reader), represents public accusation. This means there will be a consequence for sharing information that could hurt the war effort. The emotional appeal evokes fear, in order to prevent people from doing it. Thus, the poster has a persuasive purpose.
