This document discusses erosional and depositional landforms caused by sea waves. It describes how sea waves erode coastal rocks through cracks and breaking pieces, forming sea cliffs, caves, arches and stacks. Sea caves are formed by wave erosion carving holes in the coastline. Arches are formed when sea caves on either side join together. Stacks remain when arch roofs collapse. Deposition by waves temporarily deposits sand and soil to form beaches. In conclusion, sea waves cause significant morphological changes along the shoreline through both erosional and depositional processes.