Give geographical reasons:
Tertiary activities include both services and exchange.
Transportation, communication, trade and commerce are the main tertiary activities. Road, rail and airways are the important modes of transportation, which help in exchange of goods and services. Therefore, it is a service activity. Transportation provides facilities for the movement of goods from areas of surplus to areas of scarcity produced in primary and secondary activities. Credit facilities, banking facilities, marketing are also tertiary activities, they provide services to people. Postal services, shopkeepers, vegetable sellers, fruit sellers, etc., are also included in service activities.