Which feature allows iOS devices to be located remotely in case of loss?

The feature that allows iOS devices to be located remotely in case of loss is Find My iPhone. This is an integral part of Apple's iCloud services, which enables users to track the location of their devices through a web interface or another iOS device. When a device is lost, Find My iPhone can display the device's current location on a map, make the device emit a sound to help locate it nearby, and even lock or erase the device remotely to protect sensitive information.

This functionality not only aids in recovering lost devices but also provides peace of mind regarding data security. It integrates seamlessly with other Apple services, ensuring that users have a robust tool at their disposal for device management and security. While iCloud Backup provides data restoration capabilities, and other options suggest location tracking or device management, the specific and dedicated service for locating lost iOS devices is indeed Find My iPhone.