The answer is, introducing modern agricultural methods to an ancient culture.
The number of Jews migrating to the land of Israel rose significantly between the 13th and 19th centuries, mainly due to a general decline in the status of Jews across Europe. The Jewish settlers had two types of agriculture methods which were the cooperative agricultural community and the collective community method.
cooperative agricultural community was where members worked on individual farms of generally equal size and sometimes pooled labor as well as machinery and marketing, while the collective community agriculture method land and even tools and clothing were owned jointly, and all decisions were made by the community these methods were different from the ancient culture agriculture done in Israel.
C. Somalia
All of the other countries listed have pretty stable governments in place whereas in Somalia a lot of it is ungoverned or under anarchy.
All of the following were agricultural hearths, except (B)<span> sub-Saharan Africa. Basically, sub-Saharan part of Africa geographically lies in the south of the Sahara desert. Agricultural resources and works are not merely applicable in deserts like Sahara. Vegetation there is very different.</span>