The correct answer is F2. In Microsoft Excel and similar spreadsheet programs, pressing the F2 key is the standard shortcut to edit the contents of the currently selected cell. When F2 is pressed, the cursor appears within the cell or in the formula bar, allowing you to modify the existing data or formula without having to retype everything from scratch. This significantly improves efficiency when making minor adjustments to cell entries.
Option A, F1, is incorrect. The F1 key is typically used to open the help menu or provide assistance in most software applications, including Excel.
Option C, F3, is incorrect. The F3 key generally does not have a direct function for editing a selected cell in Excel. Its functions vary across different applications and contexts, but cell editing is not one of its primary uses in spreadsheets.
Option D, Edit, is incorrect.