What is the purpose of a red traffic light?

Answer: B — Stop

A red traffic light signals drivers to stop their vehicles at an intersection or designated stopping point before proceeding further. This rule is crucial for maintaining safety on the roads, as it helps to control the flow of traffic and prevent accidents. When a vehicle encounters a red light, it is expected to come to a complete stop until the light turns green, ensuring that intersections are cleared and allowing pedestrian and cross traffic to move safely. This understanding of traffic light signals is essential for all drivers, as it forms the foundation of road safety and helps to create an organized driving environment.