An appropriate title for Part A of the Venn Diagram would depend on the specific services represented in that section. However, if we consider common categorization, the title could likely be "Local Government Services" if Part A represents services provided by local authorities. If the context indicates that Part A includes services provided at a higher level, then it could be "State Government Services" or another relevant title.
Without seeing the diagram, a general best guess would be "Local Government Services."