At what age should a child transition from a rear-facing seat to forward-facing?

The correct transition from a rear-facing seat to a forward-facing seat primarily occurs when a child reaches the age of 1 year. This is aligned with recommended safety practices, as keeping children rear-facing provides better protection for their neck and spine in the event of a crash.

While the other options present additional milestones for transitioning, such as weight and physical capability, the fundamental guideline centers around age. It's crucial to recognize that the recommendation prioritizes both age and size for the child's safety. Thus, while 40 pounds and independent sitting are important factors for considering transition readiness, they are not sole determinants in conjunction with age specifications.

Hence, when a child turns 1 year old, they may transition to a forward-facing seat, but it is also essential to ensure they meet any additional size requirements and are developmentally ready for this change.