You have to wait because a rail-crossing barrier is lowered. How can you now help protect the environment at this point?

To protect the environment while waiting at a lowered rail-crossing barrier, it's essential to minimize fuel consumption and emissions. Using the automatic start-stop system is effective, as it turns off the engine when idle, reducing unnecessary fuel use and pollution.

Putting the vehicle in first gear is not beneficial in this situation because it may imply that you are ready to move, which can lead to unnecessary idling if the barrier remains down for an extended period.

Activating the parking brake is not directly related to protecting the environment but is a good practice for safety when parked. The focus should be on utilizing the automatic start-stop feature to reduce emissions effectively.

In this case, selecting only the first option is necessary for promoting environmental sustainability. Understanding these choices helps you contribute positively while adhering to traffic regulations.