Disk Defragmenter eliminates unnecessary file fragments and rearranges files and unused disk space to optimize computer operations. This is an example of which type of program?

Windows utility program.

Explanation:

The operating system is a software used to manage the activities of various parts of the computer system. It acts as a link between the hardware, application software and the user. An example of OS is the Windows OS.

It has the kernel program that directly connects the hardware to the operating system. It provides utility programs to analyse, optimise, control and maintain devices running in the system.

Window utility program is an example of utilities in OS, used to analyse, control, optimise and maintain device and software activities for good system performance.

An example of the windows utility program is the disk defragmenter used to eliminate fragments and rearrange files and unused disk space.