What is the purpose of the yellow traffic light?

Answer: B — To warn drivers that the light is about to turn red

The yellow traffic light serves the important function of warning drivers that the light is about to turn red. This indication alerts drivers to prepare to stop because it signifies the transition from the green light, which allows vehicles to proceed, to the red light, which directs drivers to halt at the intersection. The yellow light is not a signal for drivers to increase their speed or take any aggressive actions; rather, it serves as a cautionary measure. It helps in managing traffic flow and enhancing safety by giving drivers a brief window to react appropriately as they approach the intersection. Understanding this purpose is crucial for preventing accidents and ensuring an orderly transition of traffic signals.