Which feature is used to trigger the synchronization in an OutSystems mobile application?

The feature that is used to trigger synchronization in an OutSystems mobile application is indeed the option related to TriggerOfflineDataSync. This option specifically pertains to the synchronization of offline data in mobile applications, facilitating the process of ensuring that the local data on the mobile device aligns with the server data when connectivity is restored.

The method is designed to manage data in scenarios where the application can operate offline, thus enhancing user experience by enabling functionality even without a consistent internet connection. When the mobile application comes back online, this feature initiates the process of syncing any changes made while offline, ensuring that the most current data is available to the user.

The other choices do not accurately represent the specific functionality required for managing data synchronization in the context described. Therefore, TriggerOfflineDataSync is the correct and most appropriate feature to use for this purpose in OutSystems mobile applications.