Answer: Operating system
Explanation:
The operating system is one of the type of software and also the set of program that helps in manage all the computer activities in the system and also the various types of mobile hardware devices.
It is the interface between the computer hardware and the devices and manage the various types of function such as the memory management, control all the peripheral devices and also manage the file in the system.
The main function of the operating system is that it providing the various types of services and execute the function in the application software.
Therefore, Operating system is the correct answer.
