Hydraulic action
Note waves and coast, which indicates that it has to do with water (hydraulics). Because wave crashing is a kind of verb, it means that it is an action.
Therefore, hydraulic action is your best choice
hope this helps
I believe the answer is 4.2
Answer:
I think it is chemical change
When making a solution by diluting a stock solution. Suppose when a solid is stirred into a liquid and dissolves,
a homogenous mixture is formed. When the mixture does not dissolve, the mixture
is heterogeneous.