Answer:
The upper layer of the mantle is said to be thicker than the lower mantle, but not solid rock like crust. The tectonic plates rest on this layer and it is responsible for the movement of those plates.
Explanation:
hope this helps if it doesn't sorry
Because of all the industry they have there. Also because of all the mountains and how little space they have due to the huge population of Japan.
They are all european mountain ranges
