The correct option for the question "The computer hardware is made up of system unit and?" is B. peripheral. Detailed Explanation

1. Understanding Computer Hardware:
2. Computer hardware refers to the physical components of a computer system. This includes everything you can physically touch, such as the system unit, monitor, keyboard, mouse, and other devices.
3. What is the System Unit?:
4. The system unit is the main part of a computer. It houses the central processing unit (CPU), memory (RAM), storage devices (like hard drives), and other essential components. The system unit is often referred to as the "tower" or "case" of a desktop computer.
5. What are Peripherals?:
6. Peripherals are external devices that connect to the system unit to add functionality. They can be input devices (like keyboards and mice), output devices (like printers and monitors), or storage devices (like external hard drives). Peripherals are crucial for user interaction with the computer and for expanding its capabilities.
7. Why is Option B Correct?:
8. The question asks what additional components make up computer hardware alongside the system unit. Since peripherals are essential external devices that enhance the functionality of the computer, they are a correct answer. The system unit and peripherals together form the complete hardware setup of a computer.

Why the Other Options are Incorrect

• A. Motherboard:
• The motherboard is a critical component of the system unit itself. It connects all the internal components of the computer, including the CPU, RAM, and storage devices. Therefore, it is not an additional component outside the system unit but rather a part of it.
• C. Control Unit:
• The control unit is a part of the CPU, which is also housed within the system unit. It manages and coordinates the activities of the computer's components. Like the motherboard, it is not an external component but an integral part of the system unit.
• D. Central Processing Unit (CPU):
• The CPU is the brain of the computer and is located within the system unit. It processes instructions and manages tasks. Similar to the control unit and motherboard, it is not an additional component but a core part of the system unit.

Summary of Key Points

• Computer hardware consists of the system unit and peripherals.
• System unit contains essential components like the CPU, RAM, and motherboard.
• Peripherals are external devices that enhance the computer's functionality.
• Options A, C, and D refer to components that are part of the system unit, not additional hardware.

This understanding of computer hardware is fundamental for anyone studying computer science, as it lays the groundwork for more advanced topics in computer architecture and system design.