Questions: Which of the following chart elements identifies the unit of measurement or category names in a column chart? - Chart filter - Axis title - Data labels - Chart title

The answer is the second one: Axis title.

Explanation for each option:

1. Chart filter: This option allows you to filter the data that is displayed in the chart, but it does not identify the unit of measurement or category names.

2. Axis title: This is the correct answer. The axis title in a chart is used to describe the units of measurement or the category names along the axes (usually the x-axis or y-axis) of a column chart.

3. Data labels: These provide specific data values for each data point in the chart, but they do not identify the unit of measurement or category names.

4. Chart title: This provides a general title for the entire chart, summarizing what the chart is about, but it does not specifically identify the unit of measurement or category names.

In summary, the axis title is the chart element that identifies the unit of measurement or category names in a column chart.