How do you activate child locks on the back doors of a Ford Fiesta 2007?

To activate the child locks on the back doors of a 2007 Ford Fiesta, open the rear door and locate the child lock switch on the edge of the door, near the latch. Use a key or a flathead screwdriver to turn the switch to the locked position, which is usually indicated by a small icon. Once engaged, the door can only be opened from the outside, ensuring child safety. Close the door to complete the activation.