The correct answers are:
1. II and IV;
The relic boundaries are man-made boundaries that have existed in the past, but they are not existent in the present. This type of boundaries are often reminder of a period of dividing between the people with force. In the present, the relic boundaries may be found useful in order to divide the country into voting districts, but it can also very often be seen that even though the boundary doesn't exist anymore, the people on the opposite sides of it have different cultural traits. The perfect example is the Berlin Wall, where even nowadays it can easily be noticed that there's cultural differences between the Germans from the Western and the Eastern part.
2. II and IV;
The federal style of government is functioning very well in multiple countries throughout the world, but it also may be a step towards independence of a certain territory.
However, this system functions the best if a country has multiple ethnic groups, which dominate certain part of the country, or if the country has multiple political exclaves. A nice example is the Russian Federation, where these are the exact concepts used for the federal units in the country like Chechnya, Tuva, or Tatarstan.
A common rock type found within oceanic crust is called basalt rocks. It is dark just like an igneous rock and it is basically a type of lava from a volcano.
The Brazilian highlands are not in Brazil
For green plants it is used for photosynthesis in manufacture of food
