Which features can be customized in a chart created with Alteryx?

The correct answer highlights key elements of a chart created in Alteryx that can indeed be customized for clarity and presentation. Customizing the chart title allows users to provide context for the data being visualized, making it clear to the audience what they are looking at. The labels of the axes help in interpreting the data points by clearly indicating what each axis represents, whether it's a measurement, time, or categories. Similarly, adjusting the legend orientation can enhance the overall legibility of the chart, making it easier for viewers to understand object correlations within the dataset.

Other choices include features that, while relevant in different contexts, are not typically specified or customizable to the same extent in Alteryx charts. For instance, the color of charted data does play a crucial role in visualization and can be important, but the customization of data source selection typically pertains more to data preparation before visualization rather than chart-specific modifications. Chart types and gridlines can be adjusted, but they don't capture the nuance of customization as effectively as the first choice in this context.

Overall, option A encompasses direct and critical aspects of chart customization that contribute to effective data visualization in Alteryx.