/ ____________ is an application program included with Windows that allows the contents of the computer, the hierarchy of folders on the computer, and the files and folders in each folder to be viewed.

I would say to use Windows Explorer, but it appears there are several ways to organize and find files in Windows. Read your text and maybe the different articles here:

https://www.google.com/search?q=how+to+find+files+in+Windows&oq=how+to+find+files+in+Windows&aqs=chrome..69i57j69i64.15521j0j7&sourceid=chrome&ie=UTF-8

windows explorer/Explorer

Windows Explorer

The application program you are referring to is called "Windows Explorer" (or "File Explorer" in newer versions of Windows). It is a file management tool that allows users to navigate, access, manage, and organize the files and folders on their computer's hard drive.

Here's how you can open Windows Explorer/File Explorer:

1. Press the "Windows key" on your keyboard or click on the Windows icon located on the bottom-left corner of the screen.
2. In the search bar, type "File Explorer" or "Windows Explorer" and then press Enter or click on the corresponding result that appears.
3. Another way to open it is by pressing the "Win + E" keyboard shortcut.

Once Windows Explorer/File Explorer is open, you will see a window with a directory tree on the left side, and the contents of the selected folder on the right side. You can navigate through the folders by clicking on them in the directory tree or by double-clicking on them in the right pane.

Furthermore, you can perform various operations within Windows Explorer/File Explorer, such as creating new folders, moving or copying files, deleting files or folders, renaming files or folders, and much more. It offers a graphical and user-friendly interface for managing your computer's file system.