Final answer:
Zipline's business model is a subscription-based service for delivering goods via drones.1) A subscription-based service for delivering goods via drones
Step-by-step explanation:
The business model of Zipline is best described as option 1) a subscription-based service for delivering goods via drones. Zipline is a company that uses drones to deliver essential medical supplies to hard-to-reach areas. They have established distribution centers and use their drone technology to quickly and efficiently transport blood, vaccines, and other medical products.