Where can a locator created from a polyline feature class be saved?

A locator created from a polyline feature class is fundamentally tied to the spatial data it represents, and it is designed to work within the context of feature classes used in ArcGIS. By saving the locator in a feature class, it retains the ability to be integrated seamlessly with the spatial features and their attributes. This integration is essential for effective geocoding and spatial analysis.

Feature classes are part of a geodatabase and are structured to work with the types of geospatial data that locators are meant to manage. When locators are saved in feature classes, they can leverage the inherent characteristics of those classes, such as topology and spatial indexing, which enhance performance in geocoding applications.

While other options might seem plausible at a glance, they do not provide the same level of functionality in terms of maintaining the geospatial relationships and operational integrity that a feature class offers.

Therefore, the most appropriate and functional location for saving a locator derived from a polyline feature class is within a feature class itself.