As well as wave energy, other geomorphological processes can modify the coastline. Chemical, mechanical and biological weathering loosen rocks, in advance of their removal by waves and mass movement also provides loose material. There are two main types of mechanical weathering which occur at the coast.
I'm pretty sure it is just the economy
I think the answer would be c
geophysical phenomena is earth and its environment in space for example its when earthquakes, Tsunami, Volcanic activity, cyclone stuff sorta like that
hope that helps
