The desktop background is also known as:

The correct answer is wallpaper.

Explanation:

The primary visual interface that appears on a computer screen after logging into an operating system (such as Windows or macOS) is called the desktop. The image, design, or background pattern displayed behind the desktop icons and windows is commonly referred to as the wallpaper or desktop background.

Let's look at why the other options are incorrect:

• Icon: An icon is a small graphical representation or shortcut used to open files, folders, or applications.

• File: A file is a container for storing data, such as documents, images, or programs.

• Menu: A menu is a list of options or commands presented to the user to choose from.