What is the primary function of the 'Home' key on a keyboard?

The primary function of the 'Home' key on a keyboard is to move the cursor to the beginning of a line. This is a widely recognized capability across various software applications. When you press the 'Home' key, the cursor instantaneously relocates to the start of the current line where it is positioned, which can greatly enhance text navigation and editing efficiency.

In text editing, for instance, being able to quickly jump to the beginning of a line allows users to perform edits or add new text without having to manually navigate character by character. This function is particularly useful in word processors, programming environments, and text-based applications, where quick movements within a document can save time and improve productivity.

The other choices do not accurately describe the primary function of the 'Home' key, reflecting different functionalities that are assigned to other keys on the keyboard. For instance, deleting a character to the left pertains to the backspace key, whereas submitting a command is often associated with the Enter key, and toggling the keyboard language relates to specific configurations that are not a function of the 'Home' key.