An analogy is a comparison between two unlike things that share some characteristics.
A. Jobs on railroads or in factories.
Had problems in the south so they went to the north for jobs.
Those were old planes back than so their purpose was mainly for transportation to fly over to allies/enemies territory and also attack enemies from above like drop bombs, rockets, and grenades from above as surprise attack like the expression death from above, so mainly the planes were at average speed to take people in good time instead of walking on foot but mainly it was used for war purposes.
The correct answer is A.
Greece has a low amount of precipitation and, as a result of that, the agricultural sector suffers from a lack of many natural resources. Also, it is important to say that its rural land ownership system, and the emigration of the rural community into urban areas or abroad are factors that hold back the growth of the agricultural sector are also a big problem for Greece's agriculture.