Appeal to fear is a persuasive technique that tries to get someone to do something by making them afraid. For example, someone might use an appeal to fear to try to convince you to buy a certain product, like an alarm system for your house. They might say, "If you don't get this alarm system, you and your family could be in danger! It's the only way to keep them safe." This is an appeal to fear because it is trying to make you feel scared so that you will buy the product.