The feature that would not be a result of coastal erosion is Baymouth barrier. The correct option is b.
Coastal erosion refers to the process by which waves, currents, and other natural forces gradually remove and wear away the shoreline. A sea cave (a), sea stack (c), and headland (d) are all features created by coastal erosion.
Sea caves form when waves erode softer rock along the coastline, sea stacks are formed when erosion isolates a section of harder rock from the mainland, and headlands occur when softer rocks are eroded away, leaving a protruding section of harder rock.
On the other hand, a baymouth barrier is formed by sediment deposition and is typically associated with coastal deposition, not coastal erosion. Hence the correct option is b.
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