Answer:
I would say B: Calderas.
Explanation:
Calderas are depressions in the earth that have been made after a volcano erupts and then collapses. While Mountains could be an answer but Calderas makes more sence
Your answer will be The purpose of the European Union was to promote greater social, economic harmony among the nations of Western Europe.
Because the toxins from gas are not good to breath in and eventually we will al die from it
