Answer: working force largely in the tertiary sector
Notes: The correct answer is "working force largely in the tertiary sector." In underdeveloped economies, the workforce is typically concentrated in the primary (agriculture) and secondary (manufacturing) sectors, not predominantly in the tertiary (services) sector. For instance, countries like Afghanistan and Haiti have high agricultural employment, reflecting their underdeveloped status. In contrast, developed economies, such as the U.S. and Japan, have a important portion of their workforce in the tertiary sector, indicating higher economic development.
