They change shape due to a number of reasons.
The easiest reason to understand why they change is that they erode.
The coasts around the the world erode due to waves hitting cliffs, the wind batting against the coasts etc. Over a long period of time we can see that they change in shape.
(sorry I don't know why they move)
        
             
        
        
        
C.) celebrator . I don’t remember why
        
             
        
        
        
The most probable <span>question which readers should ask before reading the "More than Flavorful" section is:
</span><span>Other than adding flavor, what else can herbs do?
</span>
<span>Aside from the main purpose of using herbs which is to add flavor, answers to this question will address some other uses it can provide.</span>
        
             
        
        
        
Here is the answer to the given question above. The philosophy about relationships do the king and queen share with the wife of bath in the Canterbury tales is that, the b<span>ath's tale possess it's own ideal relationship that the wife of bath feels produces a happy and peaceful marriage. Hope this answers your question.</span>
        
             
        
        
        
It conveys the subject of the paragraph. 
That way, the subject can be further elaborated and backed up with supporting statements/evidence in the following sentences of the paragraph :)