What is the primary purpose of using seat belts while driving?

The primary purpose of using seat belts while driving is to reduce the risk of injury in a crash. Seat belts are designed to secure the occupant of a vehicle in their seat, preventing them from being thrown forward or ejected from the vehicle during a collision. This effective restraint system helps distribute the forces of a crash across the stronger parts of the body and keeps occupants safe by minimizing movement that can lead to severe injuries.

In many crash scenarios, unrestrained occupants can suffer fatal injuries or significant trauma due to abrupt stops or impacts. According to safety statistics, wearing a seat belt significantly lowers the likelihood of severe injuries and fatalities in accidents, making it a vital component of vehicle safety.

The other options, while potentially relevant to driving comfort or vehicle efficiency, do not capture the essential function of seat belts, which is fundamentally about occupant protection. Thus, the focus should always be on how seat belts help in safeguarding individuals during unexpected and dangerous situations on the road.