Why should seat belts always be worn?

Wearing seat belts is crucial because they help protect occupants in the event of a collision. When a vehicle is involved in an accident, the sudden stop can cause passengers to be thrown forward at high speeds. Seat belts are designed to restrain the body, preventing this movement and reducing the risk of serious injury or death. They work by distributing the force of the impact across the stronger parts of the body, such as the pelvis and shoulder, which helps to minimize injury.

In addition to safety, wearing a seat belt is often reinforced by laws, but the primary justification for their use is the protection they provide during an accident, making this answer the most compelling reason in a safety context. The other options may have some relevance, such as legal adherence and potential fuel savings, but the most critical function of a seat belt is clearly its role in protecting individuals during vehicular incidents.