Final answer:
The given information suggests that erosion patterns on beaches are influenced by natural forces like wave energy and sea level changes, as well as human activities like dredging. Although specifics about Beach A, B, or C are not provided, one can infer the general effects on coastal erosion based on the described factors.
Step-by-step explanation:
The main answer to which beaches are being affected by erosion is not directly provided by the information given; however, one can infer general patterns affecting beaches. For instance, from the description, we understand that ocean waves and their properties—such as amplitude and frequency—are critical in the process of coastal erosion. Also, the impact of human activities like dredging can exacerbate the erosion and damage to beach ecosystems, which has follow-on effects for local economies reliant on fisheries and tourism.The Bay of Fundy is highlighted for its significant tide variations, which influence erosion patterns extensively. Moreover, the sediment core analysis in the figures provided suggests that sea level change, whether it's rising or falling (transgression or regression), can be inferred from sediment patterns, which are indicative of historical erosion processes.In conclusion, the patterns of erosion are influenced by natural factors such as wave energy and sea level changes, as well as human activities such as dredging. While the exact beaches affected by erosion are not identified from the given information, the general factors contributing to erosion can be surmised.