what is the developing region? is it sudan?
and are the 3 reason: climate, rapid population growth and war and expenditure on arms?
If you are talking about the JC i am pretty sure the developing region is mali and the third world! the reasons are low birth rat, lack of facilities e.g hospital and education and the other reason is climate as it is too hot to grow therfore leads to abandoned land. Hope this helps ! good luck in exams gurlfriend!