Question

Which component is called brain of the computer ? Why ?

Answer 1

the central Processing Unit or the CPU is called the brain of the computer because it works as our brain works that has all the processing and memory units it as the Arithmetic units also which process the information

Answer 2

The CPU (Control Processing Unit) is called the "brain of the computer", because it controls and manages all the functions of the computer. It also does Arithmetic and Logical Queries.
Therefore, CPU works similar to our brain and is therefore called brain of the computer.