Final answer:
When a driver sees a yellow flashing light on a tow truck and slow-moving vehicle, they should exercise caution, reduce their speed, maintain a safe following distance, and be prepared to yield if necessary.
Step-by-step explanation:
When a driver sees a yellow flashing light on a tow truck and slow-moving vehicle, they should exercise caution and be prepared for the possibility of a slow-moving vehicle or a vehicle engaged in towing operations. The driver should reduce their speed, maintain a safe following distance, and be prepared to yield if necessary. This is important as the presence of a tow truck and a slow-moving vehicle indicate a potential hazard on the road, and it is important to take appropriate precautions to ensure safety.