The answer to this question can be given as "The show desktop icon".
Explanation:
To minimize all open windows we use to click on the Show Desktop icon. When we click on this desktop icon it automatically minimize all the open windows that are open on the computer screen. And all the option are not correct that can be described as:
The Start menu is part of the Microsoft windows. Start menu offers a central launching point for system programs and executing other tasks.
The system tray is part of the Window. It is on the Taskbar. It contains miniature icons for easy access to system functions.
That's why the correct answer is "The show desktop icon".
There are two options to do this one is by clicking the show desktop icon and clicking the far right corner of the system stray.
Explanation:
Even though one is not technically exposed here I wanted to put it here so you can use it. The Show me the desktop icon has to be inserted in the taskbar because is not there by default. The right far edge of the system stray is always there and you just have to click it to minimize everything.
