What natural feature is created by coastal erosion and appears as a recess on a cliff?

The natural feature that is created by coastal erosion and manifests as a recess on a cliff is accurately identified as a geo. A geo is a narrow inlet or opening formed as wave action erodes the softer rock along a cliff face, creating a cavernous area. Over time, as this erosion continues, the geo can develop into a notable feature, often characterized by steep sides and a narrow entrance, leading to a more pronounced recess on the cliff. This process is driven by the relentless force of waves against the rock, highlighting the dynamic nature of coastal landscapes.

In contrast, a cove refers to a small, sheltered bay that is typically curved, while a headland is a coastal landform that juts out into the sea, often associated with more prominent cliffs. A bay, similar to a cove, is more expansive and involves a broader area of water partially surrounded by land. Each of these features has distinct characteristics that differentiate them from a geo.