Final answer:
Graham crackers serve as a versatile ingredient in various desserts, from s'mores to brownies and pie crusts.
Step-by-step explanation:
The main idea that ties all the details together is that Graham crackers are used in different desserts. Each of the details provided is an example of how Graham crackers can be incorporated into various dessert recipes, such as s'mores, brownies, and pie crusts. This versatility of Graham crackers in dessert-making showcases their utility beyond just a snack on their own.