Final answer:
During an enforcement stop, the first action should be to turn on your right turn signal to alert the officer of your intent to pull over, then safely stop your vehicle on the right side of the road.
Step-by-step explanation:
The first thing you should do during an enforcement stop is turn on your right turn signal. This indicates to the officer that you have seen them and are complying with their request to pull over. Once you have signaled, safely move your vehicle to the right side of the road, away from traffic, and come to a complete stop in a location where the officer can safely approach your vehicle. Turning on your right turn signal is essential as it communicates your intentions and ensures both your safety and the officer's safety during the traffic stop.