Final answer:
When you see a school bus's yellow lights flashing, you should slow down and be prepared to stop for the bus. This is to ensure the safety of the students boarding or leaving the bus.
Step-by-step explanation:
When you are following a school bus and its yellow lights start flashing, it means that the bus will soon stop for passengers. In this situation, you should slow down and be prepared to stop. The flashing yellow lights indicate caution and signal that you should be prepared to yield to the bus and its passengers.
It is important to follow this signal for the safety of the students boarding or leaving the bus. By slowing down and being prepared to stop, you can help prevent accidents and ensure the safety of everyone on the road.
Remember, always be alert and cautious when driving near school buses, as children may be entering or exiting the bus at any time.