What are considered passive safety devices in a vehicle?

Passive safety devices in a vehicle are designed to protect occupants during a crash without any action required on the part of those occupants. Among the choices provided, airbags and headrests are representative of passive safety features.

Airbags deploy automatically upon impact, providing cushioning to minimize injury during a collision. Similarly, headrests are constructed to prevent whiplash and neck injuries by supporting the head in the event of a rear-end collision. Both of these devices contribute to safety by reducing the risk of injury without requiring any proactive behavior from the passengers, thus fitting the definition of passive safety devices.

In contrast, active safety devices such as brakes and tires are designed to prevent accidents from occurring in the first place, as they require driver interaction. Steering and suspension systems also fall into this category because they help maintain control of the vehicle while driving rather than providing post-collision protection. Therefore, the combination of airbags and headrests specifies the correct understanding of what constitutes passive safety devices.