Final answer:
To rearrange fields in a database so that the lastname field appears before the firstname field, use the "Move" or "Drag-and-Drop" function provided by the database software.
Step-by-step explanation:
In a database, if you need to rearrange the fields so that the lastname field appears before the firstname field, the correct action to take would be to use the "Move" or "Drag-and-Drop" function to rearrange the fields. Modern database software often provides this functionality to adjust the order of fields without deleting or recreating them. This allows for a simple and effective way to organize the data structure according to your requirements.