Final answer:
All individuals must wear safety belts in vehicles, as laws mandate their use to protect public welfare and reduce the consequences of automobile accidents.
Step-by-step explanation:
The question pertains to the legal requirement for wearing safety belts in vehicles. While the specific age requirement may vary by jurisdiction, the general consensus is that all individuals, regardless of age, must wear safety belts for their protection. Seat belts are a critical safety feature that serve to protect individuals in the event of an automobile accident by restraining them and reducing the risk of injury or death. They complement other safety features like airbags, working to minimize serious injuries during a collision.
In the context of protecting public welfare, governments enact laws requiring the use of safety belts to not only safeguard individuals but also to reduce the burden on society in providing medical care for those who may become injured due to not wearing a seat belt. Considering the significant difference airbags make in reducing force upon the passengers, one can appreciate the combined protective impact of seat belts and airbags.