Which action is described by the term 'backspace'?

The term 'backspace' refers to the action of deleting characters or spaces by moving the cursor backward. When you press the backspace key on a keyboard, it removes the character directly before the cursor's current position. This function is commonly used in text editing when a mistake has been made or if unwanted text needs to be removed.

The other actions provided do not align with the definition of 'backspace.' Copying text involves duplicating selected content rather than deleting it. Saving changes refers to the action of preserving the current state of a document or file, which is unrelated to removing characters. Moving the cursor forward pertains to navigation within a text document and is not linked to the deletion of text, as 'backspace' specifically implies a backward movement that leads to the deletion of characters.