What component typically acts as the brain of a computer?

The CPU, or Central Processing Unit, is considered the brain of a computer because it is the primary component responsible for processing instructions and managing tasks. It executes commands from programs and performs calculations, making it essential for the functioning of all software and tasks executed on the computer. The efficiency and speed of the CPU directly influence the overall performance of the system.

In a computer system, other components serve different purposes: the monitor displays visual output, the hard drive provides storage for data and programs, and the power supply converts electrical energy to the components. However, none of these components perform the processing and execution duties that the CPU carries out, making it indispensable to the operation of a computer.