Which of the following places is safe for a driver to park his car?

The choice indicating that parking on the left side of the road at night is safe reflects an understanding of traffic rules and safety considerations related to visibility and roadway use. Parking on the left side of the road is generally permissible in regions where this practice is considered legal, provided that it is not obstructing traffic, parked too close to intersections, or creating hazards for other road users.

During nighttime, visibility can be reduced, making it crucial for vehicles to be parked in a manner that does not impede the flow of other traffic, including cars and pedestrians. Properly parking on the side of the road ensures that the vehicle is less likely to be involved in accidents, making it a safer option compared to other choices.

In contrast, parking in front of a fire hydrant, on the sidewalk, or in a crosswalk poses significant safety risks and violates traffic regulations. These locations are reserved for specific uses: fire hydrants must remain accessible for emergency services, sidewalks must be clear for pedestrians, and crosswalks are designated for pedestrian crossings.