Final answer:
Children aged 0 to 13 years must be restrained in an approved safety seat according to their size and age, while teenagers should always use seat belts. These measures help protect young passengers from serious injuries in the event of a car accident.
Step-by-step explanation:
Children of various age groups need to be properly restrained in an approved safety seat when being transported in a motor vehicle. Specifically, infants and toddlers from ages 0 to 2.5 years should be in a rear-facing car seat, while those from 2.5 to 6 years should be in a forward-facing car seat.
Older children, from 6 to 13 years, should use a booster seat until they are big enough to fit seat belts properly. Teenagers aged 13 to 20 should always use seat belts. It is essential to use approved safety equipment designed for each age group to minimize the risk of serious injuries during a car accident, as highlighted by the deployment of airbags and use of seat belts.