Final answer:
The Walk Score measures the walkability of neighborhoods based on various criteria including population density and road metrics, with the correct answer being D) Neighborhood Walkability.
Step-by-step explanation:
The Walk Score is a measure designed to evaluate the walkability of neighborhoods by assessing multiple factors, including accessibility to amenities. In addition to amenities, the Walk Score also considers population density and road metrics to determine how pedestrian-friendly an environment is. It uses criteria developed by organizations like the Census Bureau, which includes a key criterion of a minimum population density of 1,000 people per square mile to define urban areas. Based on the information and options provided, the correct answer to what Walk Score measures besides amenities, using population density and road metrics, is D) Neighborhood Walkability.