Final answer:
Jessica and David are exploring new ways to maintain their friendship as they face separate high school experiences, thereby testing the strength of their bond.
Step-by-step explanation:
Jessica and David are facing a transitional period in their friendship as they are going to different high schools. Considering the fact that proximity is a significant factor in maintaining friendships, they are experiencing a potential challenge since they will not be seeing each other every day. However, David's belief that they can stay great friends implies that they are thinking of new ways to approach their friendship and stay connected despite the distance. This situation tests the strength of their friendship as they will have to put in effort and explore different methods of communication, like texting or social media, to maintain their bond.