Sorry I didn’t ask ur question what am I supposed to solve
How much degress are they
Seems very basic, the ocean is above the plate, the plate material is heavier than water (it being rock). That's pretty much all of it. The plates grind a little and new land pushes up at plate boundaries but this does not seem to be related. The heavier material is below and the lighter above, those being rock and water respectively.
Fossil fuels, they are natural fuels (because they are made of living organisms)
Africa's currency is called Rand. Hope that helps! :)