What action should you take if you see a child about to run into the street?

When you see a child about to run into the street, honking your horn is an appropriate action because it serves as an immediate warning to grab their attention and alert them to danger. The sound can help startle the child and potentially stop them from continuing into a hazardous situation.

Using turn signals is not relevant in this scenario, as signaling is primarily for indicating your own movements to other drivers and doesn't alert pedestrians. Making a sudden stop, while it may seem instinctive to prevent an accident, could create additional hazards, especially if other vehicles are behind you. Flashing headlights can also alert other drivers but is less effective for a child who may not be aware of traffic signals. Therefore, honking the horn provides the most direct and immediate warning that can help avert danger.