The **airbag** is a passive safety device that inflates in the event of an accident to protect passengers. Its main function is to **slow down the sudden movement of the body** and prevent people from violently hitting parts of the vehicle, as well as to protect the face and eyes from broken glass and other dangerous elements.

The **seat belt** is another passive safety element that keeps people in their seats during an accident, preventing them from being ejected from the vehicle. Wearing it properly significantly increases the chances of surviving an accident.

The function of the airbag is to **enhance the effectiveness of the seat belt**. Both work together to offer more complete protection: the seat belt holds the passenger, while the airbag cushions the impact and protects from additional injuries. Therefore, the airbag complements and improves the protection offered by the seat belt.