To copy the value from cell A1 to cell C1 and ensure that C1 and the entire column beneath it (C2, C3, etc.) update automatically when A1 changes, the formula to use in C1 is =$A$1. After entering this formula in C1, the user can copy it (CTRL+C) and paste it (CTRL+V) into the desired range below C1. This setup allows all selected cells to reflect the value of A1, updating dynamically with any changes.For sorting a column of numbers from greatest to smallest while keeping corresponding values in an adjacent column aligned, a VB macro is suggested as the most effective solution for automation. This approach would require programming to trigger the sorting automatically upon any changes in the data, as standard sorting methods in Excel do not offer automatic updates.