A. Using information in the graph shown, compare the data trend from 1960 to 2015 for sub-Saharan Africa to the trend shown for Europe. B. Using the data for ONE of the regions shown in the graph, explain why the trend may have an effect on the number of farms in developing countries.
C. Explain the degree to which the changes in grain yields may affect rural populations in countries in stage 4 of the demographic transition
D. Explain ONE limitation of the data in describing food insecurity at a regional scale.