Answer:
Pathos
Step-by-step explanation:
The type of appeal that is used in this slogan is pathos. Pathos refers to an appeal to emotion, and it is one of the three most common modes of persuasion, along with ethos and logos. In this slogan, the author wants to persuade parents by appealing to their emotions. He wants parents to grow worried or fearful of their children's location, and in this way send a more powerful message.