Which of the following operations prevent file loss?

The operation that prevents file loss is "File backup". File backup refers to the process of making a copy of important files and storing them in a separate location from the original files. This ensures that if the original files are lost or damaged, the backup copies can be used to restore the data. In contrast, file conversation, file maintenance, and file sorting are all important file management operations, but they do not necessarily prevent file loss. File conversation refers to the process of converting a file from one format to another, file maintenance involves ensuring that files are organized and up-to-date, and file sorting refers to the process of arranging files in a logical order. While these operations can help to ensure that files are more easily accessible and manageable, they do not provide a safeguard against file loss.