Final answer:
In the scenario where delivery app companies mark up prices for food delivery, the principle of voluntary exchange is exhibited as the consumer and delivery service both agree to the transaction terms, each believing it benefits them. Restaurants partner with delivery services to expand their customer base. The agreement is viewed as mutually advantageous despite markups.
Step-by-step explanation:
The concept of voluntary exchange is a fundamental tenet of economics, where both parties involved in a transaction believe that the exchange will be beneficial to them. In the scenario where food delivery app companies charge markups ranging from 25% to 91%, both the consumer and the delivery service are engaging in a voluntary exchange. The consumer agrees to the higher price presumably because of the convenience and value they place on the delivery service.
Similarly, the delivery service agrees to provide the service for the price listed, gaining profit from the markup. The third party in this scenario, the restaurant, also participates in this exchange by partnering with the delivery service to reach customers they might not otherwise serve, potentially increasing their sales despite the delivery service's markup.