Here's why:

* Formation: Sea caves are formed by the erosive power of waves. The constant pounding of waves against the coastline, especially in areas with soft rock like limestone, can create cracks and crevices. Over time, these cracks are widened and deepened by the force of the water, eventually forming a cave.

* Process: The primary forces involved in sea cave formation are:

* Hydraulic action: The force of the waves pushing air and water into cracks, causing pressure that widens them.

* Abrasion: The waves carry sand and rock fragments that grind against the rock face, wearing it away.

Depositional features are created by the accumulation of sediment, whereas erosional features are formed by the wearing away of existing landforms.