Which two features must be enabled for AirDrop to function properly?

AirDrop relies on both Wi-Fi and Bluetooth to function effectively. Bluetooth is used for establishing a connection and creating a peer-to-peer networking link between devices, allowing them to discover each other without needing internet access. Once the devices are connected via Bluetooth, Wi-Fi is used to facilitate faster data transfer of files between them. This combination ensures a seamless transfer experience, allowing larger files to move quickly and efficiently.

The other options do not provide the correct combination of features for AirDrop's functionality. For example, while iCloud can be involved in sharing files across devices, it is not a requirement for AirDrop, as the service operates independently of cloud services. Similarly, features like VPN, File Sharing, and Screen Sharing are unrelated to the basic requirements for AirDrop to transfer files directly between devices.