How would you protect a worksheet so that no one can make changes without a password?

To protect a worksheet so that no one can make changes without a password, the best approach is to use the "Protect Sheet" feature in Excel. This feature allows you to restrict users from editing the contents of the worksheet, including making changes to cell values, inserting or deleting rows and columns, and other modifications. When you choose to protect a sheet, you can also set a password that must be entered to unprotect the sheet later. This ensures that only authorized users can make changes.

While the other options involve aspects of protection or security within Excel, they serve different purposes. For instance, locking a worksheet is a step within the process of protecting a sheet, but on its own, it does not prevent changes until the protection is actually applied. Encrypting a worksheet is aimed at safeguarding data from unauthorized access, but it doesn't specifically prevent edits. Setting permissions refers to managing access rights but is typically more related to collaboration settings rather than individual user editing rights on a worksheet. Therefore, "Protect Sheet" is the focused solution for requiring a password to prevent changes.