Final answer:
The persuasive technique referenced in the question is patriotism, which is used to invoke a sense of national pride and unity to encourage support for a certain cause or viewpoint in advertising and political speech.
Step-by-step explanation:
The persuasive technique used in this advertisement is patriotism. This is seen in historical contexts such as World War II propaganda, which was designed to drum up patriotism and support for the war effort. Ethos is also employed when appealing to patriotic ideals, as it invokes a sense of credibility and moral character that resonates with the audience's own patriotic values. Additionally, patriotism can be a form of propaganda used to encourage people to adopt a certain viewpoint towards events in the nation like war and political challenges.