The correct option is 1, 2, 3 and 4.
Explanation
Economic activities are broadly classified into primary, secondary, and tertiary sectors. The tertiary sector, also known as the service sector, involves activities that provide support to the primary and secondary sectors through services rather than the production of tangible goods.
Analysis of the Activities:
- 1. Transport: Correct. Transport is a service that facilitates the movement of persons and goods from one place to another. It is a fundamental component of the tertiary sector.
- 2. Trade: Correct. Trade involves the buying and selling of items produced elsewhere. It is essentially a commercial service connecting producers and consumers.
- 3. Tourism: Correct. Tourism is a travel-related service industry catering to recreation, leisure, and business needs. It is considered one of the world's largest tertiary activities.
- 4. Banking: Correct. Banking and insurance are financial services that facilitate economic transactions and asset management, falling squarely under the tertiary sector.
Key Takeaway:
The tertiary sector encompasses all service-based activities, including transport, communication, trade, health, education, and administration, distinguishing it from the production-oriented primary and secondary sectors.