1. Sea Cliffs: These are steep, vertical rock faces that are formed when waves relentlessly attack the base of a coastline, eroding the rock and causing it to collapse. This process continues, gradually retreating the cliff face inwards.

2. Sea Caves: These are cavities in the cliffs created by the erosive power of waves, often concentrating their force on weaknesses in the rock, such as cracks or joints. As the cave grows, it can eventually become a sea arch.

3. Sea Stacks: These are isolated rock formations that were once part of a cliff but have been separated by wave erosion. They stand proudly in the ocean, a testament to the power of the waves.

Let me know if you'd like to know more about any of these landforms!