Final answer:
It is true that children should remain in rear-facing car seats until they are 2 years of age to best support their developing head, neck, and spine.
Step-by-step explanation:
The recommendation that children should stay in rear-facing car seats until they are 2 years of age is true. Rear-facing car seats are designed to support the head, neck, and spine of infants and toddlers in the event of a collision, which is extremely important during the early stages of physical development. For instance, during the first two months, a child's ability to hold their head up steadily is just beginning to develop. Keeping a child rear-facing until at least the age of two, or even longer if the car seat specifications allow, is the best practice to ensure their safety while traveling in a vehicle.