Without the content of the poster, it's not possible to determine the exact type of propaganda used. However, an appeal to fear involves creating fear, while the bandwagon approach suggests following the crowd. Both are common strategies used in propaganda to influence public perception.
To determine which type of propaganda is being used in a poster, we need to analyze the content and strategy that the poster employs. The types of propaganda listed in the question: appeal to fear, bandwagon, card-stacking, and stereotyping all have distinct characteristics.
Appeal to fear is a technique that attempts to create worry or fear in the audience to persuade them to believe or do something. On the other hand, bandwagon propaganda tries to convince people to do something by suggesting that everyone else is already doing it. Card-stacking involves only presenting information that supports a specific view and omitting opposing views. Lastly, stereotyping involves relying on generalized beliefs or biases about a group to persuade.
Without the actual content of the poster, I cannot confidently identify which type of propaganda is being used. However, if the poster relies heavily on creating fear to influence the audience, it would be an appeal to fear. If it suggests that a view or action is popular among a wide group, it would employ the bandwagon tactic. In propaganda, advertisers or political campaigns use these strategies to influence the public favorably towards their offer or viewpoint.