Which of the following backup methods only backs up data that has changed since the last backup of any type?

Progressive is not a standard, recognized backup method name in this context; common methods are full, incremental, and differential.

A full backup copies all selected data, regardless of whether it has changed, consuming the most storage and time.

An incremental backup specifically copies only the data that has changed since the most recent backup of any type (either a full backup or the last incremental backup). This method minimizes the backup window and storage space required because it only captures new or modified data blocks.

A differential backup copies all data that has changed since the last full backup, not since the last backup of any type, meaning its size grows over time until the next full backup.