How often should a rear-facing car seat be checked for proper installation?

The correct choice highlights the importance of ensuring the safety of a rear-facing car seat each time it is used. Car seats can shift due to various factors such as changes in temperature, movement within the vehicle, or adjustments made during loading and unloading. Checking the installation every time ensures that the seat remains secure and properly positioned, which is crucial for the effectiveness of the seat in protecting a child in the event of a collision.

Regular checks help to confirm that the harness is snug and correctly threaded, and that the seat is at the proper angle for the child's age and size. This proactive measure significantly enhances the safety of the child being transported, ensuring that the car seat functions as intended whenever it is needed.