Final answer:
The major social development measure for Sub-Saharan Africa is the Human Development Index (HDI), which measures average achievement in key aspects of human development including life expectancy, education, and income per capita.
Step-by-step explanation:
The major social development measure for Sub-Saharan Africa is the Human Development Index (HDI). HDI is a composite index that measures average achievement in three basic dimensions of human development: a long and healthy life, knowledge, and a decent standard of living. It takes into account indicators such as life expectancy, education (years of schooling and expected years of schooling), and income per capita.
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