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)
Answer:
This shows that Scout is a brave, good person, even if she can be misguided and sometimes mean. Scout cares about others but does not think before she acts.
Explanation:
Answer: I think ot is onomatopoeia
Explanation:
Hope it is right.