What is a “booster seat”?

A standard seat that is designed for transporting children until 18 years of age

A seat that is designed for transporting small children, restrained by the safety belt of the vehicle.

A seat that is designed for transporting children on bicycles only while the children are restrained by a safety belt.

A seat that is designed for a driver whose height is less than 160 cm and whose age is more than 18 years