Final answer:
The correct action is to pull over and stop behind parked vehicles when there is not enough room on a narrow street to pass an oncoming vehicle safely.
Step-by-step explanation:
When on a narrow street and you don't have enough space to pass by an oncoming vehicle, the proper action to take is to pull over behind parked vehicles. It is a safer approach to stop moving and become stationary till the oncoming vehicle passes by. This cautious move ensures road safety for yourself, the oncoming vehicle, and any pedestrians that might be in the area.