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

The primary function of the CPU, or Central Processing Unit, is to execute programs' instructions and commands. It is often referred to as the "brain" of the computer because it performs the calculations and processing tasks that allow software applications to function. When you run a program, the CPU interprets and processes the program's commands, executing instructions, performing arithmetic operations, and controlling other hardware components through the system's architecture.

This role is crucial because, without the CPU's ability to execute these instructions, the computer would not be able to perform tasks like data processing, running applications, or managing system operations, essentially making it inoperative for user functions. The interaction between the CPU and the memory, where data and instructions are temporarily stored for quick access, is vital for efficient performance.

Other functions mentioned in the choices pertain to different components of the computer. For example, tasks like data storage are primarily handled by memory and storage devices such as hard drives and SSDs, while connectivity options are managed through the motherboard and networking hardware. Power management is typically handled by power supply units and battery management systems, separate from the functions that the CPU carries out.