Drivers must slow down or stop for pedestrians within:

The requirement for drivers to slow down or stop for pedestrians is particularly critical in intersections and both marked and unmarked crosswalks. These areas are where pedestrians are most likely to cross the road. Ensuring that drivers are attentive and ready to yield to pedestrians in these specific locations can significantly enhance pedestrian safety. The law emphasizes that vehicles must give right of way to pedestrians in these scenarios to prevent accidents and promote safe crossing.

While school zones, highways, and parks may have their own regulations regarding pedestrian safety, the legal obligation to yield primarily focuses on locations where pedestrians are actively crossing or expected to cross the road, making intersections and crosswalks the crucial points of concern. This is why the correct answer highlights the importance of fulfilling this responsibility in specific areas designed for pedestrian movement.