Final answer:
When you see a caution sign indicating a traffic light change, proceed through the intersection cautiously without speeding up, and be prepared to stop if it's safe.
Step-by-step explanation:
When you see a caution sign warning that a traffic light is about to change, the appropriate action is to proceed through the intersection cautiously, but do not speed up to beat the yellow light. This means being prepared to stop if the light turns yellow and it is safe to do so, rather than accelerating and potentially causing an unsafe situation. It's essential to adhere to the posted speed limit and ensure the safety of all road users, including pedestrians who may be crossing.