If a search returns _______ it can be viewed as a chart.

The ability to view a search result as a chart in Splunk is typically linked to statistics derived from the data. When a search returns statistical results, it means that the data has been aggregated or summarized in a manner that can be visualized. This could include values such as averages, totals, counts, or other metrics that lend themselves well to graphical representation.

Charts are especially useful for presenting trends, comparisons, and distributions in a clear visual format, giving users the ability to easily interpret complex data at a glance. While events, keywords, and timestamps are integral components of data handling, they do not inherently involve the aggregation or summarization required to be visualized in a chart format. Statistics specifically indicate processed data suitable for visualization, making this the correct choice for the question.