Which of the followingincludes all the physical parts of a computer

The correct answer is "hardware".

The option that includes all the physical parts of a computer is called the "hardware." Computer hardware refers to all the tangible components that make up a computer system, including the central processing unit (CPU), memory (RAM), storage devices (hard drive or SSD), graphics processing unit (GPU), motherboard, power supply unit (PSU), input/output devices (keyboard, mouse, monitor), and various external peripherals.

To determine which of the following options includes all the physical parts of a computer, you can analyze each option individually.

Option A: Central Processing Unit (CPU)
The CPU is the "brain" of the computer and is responsible for executing instructions and performing calculations. While the CPU is a critical physical component, it does not include all the physical parts of a computer, so option A is not the correct answer.

Option B: Monitor
The monitor is the visual output device that displays information from the computer. While it is an essential component for viewing and interacting with the computer, it does not encompass all the physical components of a computer, so option B is not the correct answer.

Option C: Keyboard, Mouse, and Printer
This option mentions a keyboard, mouse, and printer. While these peripherals are commonly used with a computer and are physically present, they do not account for all the physical parts of a computer. Option C is not the correct answer.

Option D: Motherboard, Memory, and Hard Drive
The motherboard is the main circuit board that connects and supports various components of a computer. Memory, such as RAM, provides temporary storage for data and instructions. The hard drive is a permanent storage device for data and programs. These components, along with others like power supply, graphics card, and cooling system, together make up the physical parts of a computer. Option D is the correct answer as it includes essential components that encompass the entirety of the physical parts.

Therefore, the correct option is D: motherboards, memory, and hard drive.