Final answer:
Upon seeing a yellow light, you should always slow down and stop before the intersection for safety. This rule is important for pedestrian safety and to control vehicle speed.
Step-by-step explanation:
When you see a yellow light, the correct action is to slow down and stop before entering the intersection if you can do so safely. The best choice is (a) Always, regardless of whether other cars are present or the presence of pedestrians. The primary purpose of this is pedestrian safety and to prevent vehicles from speeding through the intersection. Traffic signals are significant as they help regulate traffic flow and ensure the safety of all road users, including those crossing the street and vehicles complying with traffic laws.