Which sector includes teaching and nursing?

• A. Primary
• B. Tertiary
• C. Secondary
• D. Quaternary

Answer: (B)

This question tests how we classify economic activities by the type of work. Teaching and nursing are services that people rely on directly for education and health. The tertiary sector encompasses such services—areas like education, health care, retail, and hospitality—where the main activity is delivering a service rather than producing or extracting resources. Therefore, teaching and nursing belong to the tertiary sector. The primary sector involves extracting natural resources; the secondary sector handles manufacturing and processing; the quaternary sector covers knowledge-based activities like research and information services, which focus more on creating or handling information than on direct service delivery.