The correct answer is - plate tectonics.
The convection currents in the mantle, are having very high temperatures and very high pressures. Because of that, they managed to crack the crust, and thus divide the surface of the Earth in multiple peaces, or as we call them, tectonic plates. The very high pressure from bellow manages to push the tectonic plates in certain direction, and even though that movement is only a couple of cm per year, on the long term it has huge effects on everything on the planet.
To find area you multiply its height by the width so 2x2 = 4 (what unit it is)
Hello there!
The only one i can see caused primarily by human activities would be A. Air Pollution.
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Good Luck :)
Liberia.
It comes from the Latin word liber which means free and Liberia is a country in West Africa.
