Final answer:
A child weighing 18-36 kg should be in a car seat, specifically a booster seat, according to safety guidelines.
Step-by-step explanation:
According to safety guidelines, a child weighing 18-36 kg should be in a car seat. Car seats are designed to provide proper restraint and protection for children based on their weight and height.
The specific type of car seat that is appropriate for this weight range is a booster seat.
It is important to note that the age and height of the child should also be taken into consideration when determining the appropriate car seat.
Different car seats have different weight and height limits, so it is essential to refer to the manufacturer's guidelines and follow the local regulations to ensure the child's safety.