Which component of the vehicle helps in restraining occupants during a crash?

The correct choice is active restraints because they are specifically designed to protect vehicle occupants during a crash by restraining movement. Active restraints include devices such as seat belts and airbags, which work in conjunction to secure the occupant in their seat and prevent them from being thrown forward or ejected from the vehicle in the event of a collision. Seat belts, for instance, secure the body in place, while airbags cushion the impact and reduce the risk of injury.

In contrast, windshields, bumpers, and mirrors do not provide direct restraint to passengers during a crash. The windshield serves primarily as a barrier against wind and debris, bumpers are designed to absorb impact and protect the vehicle's structural integrity and aesthetics, while mirrors assist with visibility but have no role in restraining occupants. Therefore, the focus on active restraints underscores their critical function in enhancing passenger safety during accidents.