Which feature would you use to prevent unauthorized users from editing a sheet?

Locking specific columns or rows is the most effective feature for preventing unauthorized users from editing a sheet. By locking certain areas, you can restrict access to critical information, ensuring that only users with the appropriate permissions can make changes in those specific sections. This is particularly useful when different team members need varying levels of access to the sheet's content, allowing for a tailored approach where sensitive data is protected.

While sharing settings and access control levels also play vital roles in setting permissions for users, they primarily govern who can view or edit the sheet as a whole rather than providing granular control over specific data points within the sheet. Version history, on the other hand, is useful for tracking changes and reverting to previous states of the sheet, but it does not prevent users from making edits in the first place. Locking specific columns or rows provides that direct control needed to safeguard against unauthorized modifications.