The correct answer is It is a part of the operating system which carries out the defragmentation of disk formattingUtility software works as an interface between system software and application software. Utility software:It is a third-party tool designed to reduce maintenance issues and detect errors in the computer system. It comes with the operating system in the computer system. Features of utility software:It helps users to protect against threats and viruses. It helps to reduce disk size such as WinRAR, WinZip. It works as a Windows Disk Management service and helps in a disk partition. It facilitates users to back up the old data and enhance the security of the system. It works as a de-fragmentation of a disk to organize the scattered files on the drive. It helps to recover the lost data. It helps to perform the antivirus and security software to maintain the security of the data in a computerHence, utility software is a part of the operating system which carries out defragmentation or disk formatting.