Data Representation context: Beach profiles were measured before and after storms along a seawall and an adjacent natural dune. Figure 1 summarizes two model predictions and a new observation. Model A, Wave-absorption model, predicts that a seawall should absorb wave energy and prevent scour at its base. Model B, Wave-reflection scour model, predicts that waves reflected by a seawall should increase erosion at the wall base. New observation: a deep scour trough formed at the base of the seawall after storms, while the dune profile changed gradually. What is the strongest evidence-based conclusion about the two models?