Which component is known as the "brain" of the computer?

The central processing unit (CPU) is known as the "brain" of the computer because it is responsible for executing instructions and processing data. The CPU carries out the fundamental operations required for all tasks performed by a computer, including arithmetic operations, logical operations, and control functions. It processes input data, runs programs, and interacts with other components of the system to ensure that the computer operates effectively.

In addition to its processing capabilities, the CPU's design and architecture significantly influence the overall performance and speed of the computer. Factors such as clock speed, cores, and cache size are key characteristics that determine how quickly and efficiently a CPU can process information. This central role in managing computations and executing commands is what earns the CPU the title of the computer's "brain."