Rotation.
Crop rotation is when a farmer changes the crops grown in the same field each year to ensure he gets the best harvest possible by not exhausting the soil of specific nutrients by repeatedly growing the same thing.
Although there are numerous factors that can affect a counties GDP, especially today when the entire world is so "connected", a major reason why GDP fluctuates so much in this part of the world is that these economies rely primary on agriculture, which can be profitable one year and then not profitable the next, due to weather changes.
Just do your usual studying and pace yourself.
Citizenship by birth (jus sanguinis). If one or both of a person's parents are citizens of a given state, then the person may have the right to be a citizen of that state as well. ... This form of citizenship is common in civil law countries. Born within a country (jus soli).
Hope this helps :)
