In which countries applies the walk score?

The walk score is a tool that measures the walkability of neighborhoods based on the proximity of various amenities and services. It is primarily used in urban contexts to encourage pedestrian-friendly environments. The correct choice highlights the countries where the walk score has been established as a resource for evaluating walkability, which includes the United States, Canada, and Australia.

These countries have embraced the concept of walkability in urban planning and development, reflecting a growing awareness of the benefits of walkable communities, such as reduced carbon footprints, improved public health, and enhanced economic activity. While the walk score may be referenced in other countries, its primary application and data collection are firmly rooted in these three. Thus, the answer emphasizes regions where walk score data is consistently utilized and recognized in discussions of urban design and development.