Which of the following is a legal requirement for drivers in Missouri?

Wearing seatbelts is a legal requirement for drivers in Missouri, reflecting the state's commitment to promoting safety and reducing the risk of injuries in the event of a car accident. Missouri law mandates that all occupants of a vehicle, regardless of seating position, must wear appropriate safety restraints. This law is enforced for both drivers and passengers, demonstrating the emphasis on responsible driving practices.

In contrast, having cell phones while driving, utilizing a GPS system, or driving only during daylight are not mandated by law in Missouri. While it is advisable to use hands-free devices and navigation systems for safety and convenience, there's no legal obligation to have them in the vehicle. Driving during daylight doesn't restrict when one can drive, as individuals retain the freedom to operate vehicles at any time, as long as they comply with other relevant traffic laws.