How should a GIS analyst share a Python script within a model for modification by online users?

The most suitable option for sharing a Python script within a model for modification by online users is through a geoprocessing package. A geoprocessing package allows for the encapsulation of a model or script along with all its dependencies, which facilitates easier sharing and modification. It can include input datasets, tools, and a defined set of parameters ensuring that users who access it can run the model or script with all necessary components included.

Geoprocessing packages are designed specifically for distribution, allowing other users to easily unpack and access the contained model or script within ArcGIS environments. This format ensures that the integrity of the script is maintained, while still providing users with the ability to modify and utilize its functionality as needed in their projects.

The other choices don't serve the same purpose effectively. For instance, while a web tool can share tools and models online, it might not provide the same level of detail and organization as a geoprocessing package. A project package is more about sharing entire project files and settings rather than just a script, and a Python toolbox is useful for creating a collection of related scripts but may not be as easily shareable for modification by users in an online context. Thus, a geoprocessing package stands out as the