Final answer:
Option A, where a parent teaches a child to farm using traditional methods, best exemplifies how traditional economies provide employment and income through generational knowledge transfer and subsistence farming.
Step-by-step explanation:
The situation that best illustrates how traditional economies meet their citizens' needs for employment and income is option A: A parent teaches a child to farm using centuries-old techniques. In traditional economies, economic roles are directly linked to the customs and traditions of the society. Occupations are often passed down through generations, with children learning trades and skills from their parents. Subsistence farming is common, and individuals typically produce what they consume, adhering to the practices established by their ancestors.