Which feature allows users to filter widgets effectively?

The feature that allows users to filter widgets effectively is hierarchies. Hierarchies provide a structured way to organize and categorize data, which enables users to drill down into specific levels of information. By organizing data into hierarchical structures, such as parent-child relationships, users can filter and navigate through complex datasets more intuitively. This makes it easier to identify specific data points and visualize relevant information based on user-defined criteria.

While color coding can enhance the visual appeal and quick comprehension of data, it does not facilitate filtering in the same structured way that hierarchies do. Graphs serve as a visualization tool but do not inherently provide filtering capabilities. Alert systems notify users of specific conditions or changes but do not organize or filter data for analysis. Therefore, hierarchies distinctly enhance the user's ability to filter and analyze widgets effectively.