Child restraints are required for which of the following?

Child restraints are crucial for ensuring the safety of younger passengers in a vehicle. The correct response highlights that infants and children under the age of 4 and weighing less than 40 pounds must be secured in an appropriate child safety seat. This requirement is based on research indicating that young children have smaller bodies and are more vulnerable to injury in the event of a collision. Safeguarding them in a specialized seat designed for their size significantly reduces the risk of severe injury.

The other options, while addressing important aspects of child safety, do not encapsulate the comprehensive guidelines set forth for child restraints in Ohio. For instance, the age and weight specifications in the other choices do not fully align with the regulations aimed at protecting the most vulnerable passengers on the road.