Final answer:
Tennessee law mandates that children under the age of three must be placed in an approved child restraint device when traveling in a vehicle.
Step-by-step explanation:
The law regarding child restraint devices in Tennessee requires that children under 3 years of age must be placed in an approved child restraint device. This legislation reflects a societal effort to protect its youngest members while they are passengers in motor vehicles.
Similar to regulations around child labor and seat belt use, child restraint laws serve to prevent harm and ensure the welfare of children.