Here's how it works:

* Waves crashing against the coastline: The powerful force of waves constantly erodes the rock face, breaking it down into smaller pieces.

* Abrasion: The waves carry sand and pebbles that grind against the rock, further eroding it.

* Hydraulic action: The force of water entering cracks and crevices in the rock can cause them to widen and eventually break apart.

* Weathering: Rain, wind, and ice can also contribute to the breakdown of the rock face.

While deposition does play a role in the formation of some coastal features like beaches and sand dunes, it's not the primary force behind the creation of sea cliffs.