Final answer:
The term called "the brain" of the computer is the central processing unit (CPU), which is responsible for carrying out the commands of a computer's programs and performing the system's main operations.
Step-by-step explanation:
The term that is also called "the brain" of the computer is the central processing unit (CPU). The CPU is responsible for executing instructions from computer programs and performing the basic arithmetical, logical, and input/output operations of the system. It is akin to the command center of the computer, interpreting and executing most of the commands from the computer's other hardware and software. The options provided in the question are:
- Network Card
- Motherboard
- Thumb Drive
- Central Processing Unit
Out of these options, the central processing unit fits the description of the brain of the computer. Other components like the motherboard act as the backbone that connects all components, and the network card and thumb drive are responsible for network communication and data storage, respectively.