Final answer:
The data source that provides comprehensive information about the function of the community is elected officials, as they hold responsibility for community decisions and operations.
Step-by-step explanation:
The data source that provides information about the function of the community is likely to be an entity involved with community operations and issues. Local government bodies such as elected officials are directly responsible for making decisions that impact the community, including changes to property tax rates and school district policies. Whereas a local restaurant might reflect economic aspects of a community, and civic groups and the county health department address specific areas such as health and social welfare respectively, it's the elected officials that provide comprehensive information about the function and administration of the community.
They often have meetings and forums which are critical for community engagement and decision-making. Therefore, elected officials are a primary source of information about the functioning of the community.