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
Rip currents are mainly caused when the sea is rough and large waves break into the shore. the water from the previous large wave tries to find a weak spot in the incoming wave and when it finds it, the water quickly pulls away from the shore causing dangerous rip currents. This type of currents have caused numerous deaths.
Concrete is not a crystal.
The light spreads on the earth unevenly due to It's tilt. The position
of the earth changes in orbit, and the earth either becomes tilted
towards or away from the sun. This is why seasons happen.
