Answer:
1, 2: there are no taxes on brought in gods, the money, the workforce and the goods can stream within the borders of the EU freely and in this way the whole EU is more competitive in an international level
3,4:the western part of the EU more developed due to the inherited capitalist economy and Marshall plan by the USA, while the post communist more backward because of the ex communist industrial economy and because of the fact that they had to change to capitalist
Not all the countries have euro within the EU just the more developed nations with few exceptions like Sweden and therfore the EU is not united in this front as well
Well for starters, we have minerals in our bodies like iron, calcium, magnesium, etc. but we also use it for things like electricity and buildings and cars such as we use copper in electricity, iron to make steel, and so on
Landscape of your community can change by growth as more people move there they would have to build on more. hope this helps!!!!