Final answer:
Direct interaction to change a parameter value in a visualization is accomplished through filtering, which allows audiences to select specific data they wish to view.
Step-by-step explanation:
The actions that allow your audience to change a parameter value through direct interaction with a visualization include Filtering. While dragging and zooming are also interactive actions, they typically do not change a parameter value within the visualization itself. Instead, they adjust the view or focus on the visualization. However, filtering directly alters the data being displayed. For example, when you select a specific category or a range of values in a chart or graph, filtering will change the visualization to only show the data that fits your selection criteria. This provides a more interactive and engaging experience for the audience.