Which of the following tools is NOT associated with modifying associations in a Utility Network?

In the context of modifying associations within a Utility Network, the Analyze Connectivity tool is not designed for this purpose. Instead, its main function is to assess and analyze how elements within the network are connected, helping users to understand the flow and relationships among various components in the Utility Network.

On the other hand, the Set Network Category GP tool, Add Rule tool, and Modify Associations pane are all specifically intended for managing and altering the associations between network elements. The Set Network Category GP tool is used to define the category that a network features belong to, affecting how they interact with one another. The Add Rule tool allows users to establish new rules that define or refine the connections and relationships among features. Finally, the Modify Associations pane provides a user interface for users to directly interact with and modify associations between network elements, enabling more granular control over the network's structure.

Thus, the Analyze Connectivity tool stands out as it focuses on connectivity analysis rather than modification, highlighting why it is not associated with the task of modifying associations within the Utility Network.