What is the role of an operating system?

The role of an operating system is fundamentally to support a computer's basic functions. An operating system serves as the interface between the user and the computer hardware, managing resources such as the CPU, memory, disk storage, and input/output devices. It enables users to run applications, facilitates file management, and handles system security and access control. This foundational role is critical for ensuring that all components of the computer work together efficiently.

The other options focus on specific functions that are not central to the primary purpose of an operating system. While acting as an internet browser is important for web access, it is a separate application that relies on the operating system. Graphic design capabilities are features found within software applications rather than the operating system itself. Additionally, the management of hardware repairs is not a typical function of an operating system; instead, maintenance and repair typically involve physical interaction with hardware or specific diagnostic tools. Thus, the correct answer accurately reflects the core responsibilities of an operating system.