Which type of service allows clients to access vector features of a map and perform editing?

The correct answer is Feature Service because it is designed to allow clients to not only access vector features of a map but also to perform editing on those features. Feature Services expose the underlying features as operational layers, and they support operations such as create, update, and delete, which are essential for interactive editing in web mapping applications and geographic information systems (GIS).

When using a Feature Service, clients can manipulate geospatial data in real-time, which is integral for applications that require dynamic updates to the data, such as in field data collection and management systems. This capability makes Feature Services particularly useful for workflows that involve collaborative data editing and management.

In contrast, other types of services such as Image Services serve primarily to deliver raster data and do not support editing capabilities. Map Services provide rendered map images based on underlying data but do not allow for direct manipulation of the underlying features. Geodata Services are usually focused on managing and analyzing spatial data in a geodatabase but are not directly designed for real-time feature editing by clients.