Concept:The brain of the computer is the main processing unit that controls and coordinates every operation performed by the system.
Explanation:The Central Processing Unit (CPU) is regarded as the brain of the computer because it processes all instructions and data.
It contains the control unit and the arithmetic logic unit, which handle decision-making and calculations.
When a program runs, the CPU fetches instructions from memory, decodes them, and executes the required operations.
Every input received and every output produced passes through the CPU for processing.
Without the CPU, the computer cannot execute any program or perform any meaningful task.
The monitor, mouse, and printer are peripheral devices.
The monitor displays output, the mouse sends input, and the printer produces hard copies; none of them processes data like the CPU does.
Therefore, among the options listed, only the Central Processing Unit fits the description of the computer's brain.
Answer:A. Central Processing Unit