A fjord.
cliffs are created by erosion
The agent of erosion on cliffs mostly is gravity.
Weathered cliffs are formed as natural rain storms or snow and ice cause parts of the cliffs to break off and fall. This weathering also includes erosion caused by water passing from the top of the cliff to the bottom.
Gravity
yes
Erosion by the wind, rain and waves will wear cliffs away
Through Water and Erosion At least
cliffs
yes
wave erosion
Coastal erosion
its a concreete stuchure to protect the cliffs from erosion