Which of the following actions should a driver take when observing a pedestrian crossing a road?

When a driver observes a pedestrian crossing a road, the appropriate action is to stop and give the pedestrian the right of way. This is essential for ensuring the safety of the pedestrian, as pedestrians have the right of way in designated crosswalks and often in other situations where they are crossing at intersections. Yielding to pedestrians helps promote a safer environment and reduces the risk of accidents.

By stopping for pedestrians, drivers are following traffic laws that dictate giving priority to those on foot, which is crucial for protecting vulnerable road users. Additionally, this practice fosters a culture of respect and awareness on the road, which is beneficial for everyone, including drivers themselves.

The other options, such as speeding up to pass the pedestrian or honking the horn, do not promote safety and may lead to hazardous situations. Waiting for the pedestrian to cross before proceeding can sometimes be acceptable, but stopping and allowing them to cross is the better choice to ensure their safety fully.