Get Tech-Savvy in Style 2025: Ace the Computer Concepts Challenge!

The CPU, or Central Processing Unit, is a crucial component of a computer that executes instructions and processes data. It is located on the motherboard, which serves as the main circuit board connecting all of the computer’s parts together. The motherboard houses the CPU, along with other essential components such as memory (RAM), expansion slots, and chipsets that facilitate communication between the CPU and other hardware.

This placement is significant for several reasons: it allows the CPU to communicate with the system's memory and peripherals efficiently, and it provides a stable environment for the processing tasks the CPU manages. The other options do not contain the CPU; for example, the power supply is responsible for providing electricity to the components, a mainframe refers to a large, powerful operating system often used for large-scale computing, and the hard drive is a storage device that does not include processing capabilities. Therefore, identifying the motherboard as the location of the CPU is fundamental to understanding the architecture of a computer system.