Answer: The answer is erosion.
Step-by-step explanation:
Erosion is the removal of material from the surface of the earth's crust. For example, wind and water. Wave causes erosion.
Impact of wave: The wave strikes the shore and by sand. Here, erosion is accomplished by hydraulic pressure. This occurs in coastal region. Coastal erosion is caused by hydraulic action and wind.
Therefore, wave impact and pressure cause erosion.