Which four data products and services does ArcGIS Online provide?

ArcGIS Online provides a variety of data products and services that enhance geographic data analysis and visualization. Among these, demographic data stands out as a valuable resource. This type of data includes statistical information about populations, such as age, income, education levels, and more, which users can leverage for spatial analysis and decision-making.

Demographic data is essential for urban planning, marketing strategies, and social research, making it a key offering in the ArcGIS Online suite. Users can access and analyze this data to better understand community needs, market potential, or trends.

The other options, while potentially related to geospatial data applications, do not encapsulate the primary services offered directly by ArcGIS Online as demographic data does. For instance, registries may refer to various data organization systems, while imagery and data enhancement can be aspects or tools within the broader context of geographic information systems but are not classified specifically as fundamental data products available from ArcGIS Online in the same regard as demographic data.