Explanation:

Explanation: The erosion and deposition of the sea waves gives rise to coastal landforms. Sea  waves continuously strike at the rocks. Cracks develop. Over time they become larger and wider.  Thus, hollow like caves are formed on the rocks. They are called sea caves. As these cavities  become bigger and bigger only the roof of the caves remain, thus forming sea arches. Further,  erosion breaks the roof and only walls are left. These wall like features are called stacks. The steep  rocky coast rising almost vertically above sea water is called sea cliff. The sea waves deposit  sediments along the shores forming beaches.