Give geographical reason : Tertiary economic activities include both services and exchange.

Answer: Tertiary activities do not produce goods directly; they support primary and secondary activities either by providing services or by exchanging goods, so they include both.

• Services: doctors, teachers, lawyers, banking, insurance, administration and entertainment offer skills and expertise to people.
• Exchange: trade (wholesale, retail, international), transport and communication move goods, people and information from producers to consumers.
• Both types are not directly involved in production but are necessary for it. Hence tertiary activities include both services and exchange.