An international traveler is concerned about others accessing the contents of their smartphone if it is lost or stolen. The traveler has enabled biometrics. Which of the following additional security measures further reduces the risk of unauthorized data access?

Remote backups are useful for recovering data if a device is lost or damaged, but they do not prevent unauthorized access to data on the device itself. Without encryption, the data could still be accessed by anyone who gains physical possession of the smartphone, rendering the backup feature ineffective for protecting sensitive information.

Location tracking allows the user to monitor the device's whereabouts, which can help in retrieving it if lost or stolen. However, this feature does not provide any protection against unauthorized data access. If someone finds the device, they can still access the data unless it is encrypted.

A PIN code screen lock provides a basic level of security by preventing unauthorized access to the device when it is powered on. However, if the device is powered off or a security flaw is exploited, the PIN may not be sufficient to keep the data secure. Device encryption offers a more robust solution by ensuring data remains inaccessible regardless of the state of the device.