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

For AirDrop to function properly, it is essential to have both Wi-Fi and Bluetooth enabled on the devices involved. AirDrop utilizes Bluetooth to discover nearby devices and establish a connection, while Wi-Fi is used to facilitate the actual data transfer between the devices. This combination allows for fast and efficient file sharing without needing an internet connection.

In contrast, the other options introduce features that are either unrelated to AirDrop's functionality or contradict its requirements. For instance, using a VPN can actually interfere with network connections and isn’t necessary for AirDrop. iCloud is not a requirement for AirDrop, as it functions independently of the iCloud service. Lastly, File Sharing and Screen Sharing are features that may be useful for other types of sharing but are not relevant to the core operation of AirDrop itself. Therefore, enabling Wi-Fi and Bluetooth is the crucial step needed to ensure that AirDrop operates smoothly.