A child aged 1 to 4 years must use what type of car seat?

The correct choice is that a child aged 1 to 4 years must use a forward-facing child seat in the back seat. As children grow and develop, their safety requirements in vehicles change. A forward-facing child seat is designed to provide additional support and protection for larger toddlers who have outgrown their rear-facing seats. These seats are equipped with a harness system that keeps the child secure and limits excessive movement in the event of an accident.

Children between 1 and 4 years old are generally in the transition phase from rear-facing to forward-facing seats, depending on their size and weight. It is crucial that they are positioned in the back seat, as this area is statistically the safest place for children in a vehicle during a crash.

The other types of seats mentioned are appropriate at different stages of a child's growth. A rear-facing seat would typically be used from birth until they reach the height or weight limit set by the car seat manufacturer. A booster seat is usually appropriate for older children who have outgrown forward-facing seats but are not yet ready for a standard seat belt alone. Finally, a standard seat belt is intended for older children and adults who can sit properly in the vehicle with the seat belt correctly positioned across their body.