Which one is a Utility Software ?

Utility software is a type of software that is designed to help maintain and optimize a computer's performance. Some common examples of utility software include:

Antivirus software - helps protect against viruses, malware, and other security threats.
Disk Cleanup - helps free up disk space by removing unnecessary files.
Backup software - helps create backups of important data to prevent data loss in case of hardware failure or other issues.
System optimization - helps optimize the performance of a computer by cleaning up the registry, defragmenting the hard drive, and managing startup programs.
File compression - helps reduce the size of files to save disk space and make them easier to share.