What is the primary function of the CPU in a computer system?

The primary function of the CPU, or Central Processing Unit, in a computer system is to execute instructions and process data. The CPU acts as the brain of the computer, interpreting and carrying out operations defined by the software programs, which are essentially a series of instructions. When a program runs, the CPU fetches these instructions from memory, decodes them to understand what actions are required, and then executes them, manipulating data as necessary.

While storing data and programs is an essential function in a computing environment, this task is primarily managed by memory and storage devices rather than the CPU itself. Similarly, managing hardware resources is typically the role of the operating system, which oversees various hardware components and ensures they work together effectively. Providing user interfaces, on the other hand, involves software components that interact with users, such as operating systems and applications, rather than the CPU directly. Thus, the CPU's core responsibilities are encapsulated in executing instructions and processing data, making that option the correct choice.