Final answer:
To facilitate other drivers in passing your vehicle safely, you should reduce your speed slightly while still moving and give them enough room to overtake.
Step-by-step explanation:
To help other drivers pass your vehicle, the most appropriate action would be to reduce your speed slightly if possible and give them ample room to manoeuvre around your vehicle safely. It is important that you continue moving at a safe speed that allows you to maintain control and gives the passing driver the space needed. Overly slowing down, directing them when you're moving slowly, pulling over, or not allowing them to pass are not generally safe or recommended methods. It is always important to check your mirrors and ensure it is safe for others to pass before you adjust your speed or position on the road.