The following chart is an example of a ________.

A cartogram is a type of map or chart that distorts the geometry of regions based on a specific variable, rather than their actual size or shape. This allows for a visual representation where the size of each region is proportional to a particular data attribute, such as population or economic output.

In contrast, a bar chart uses rectangular bars to show comparisons among categories, while a pie chart displays proportions of a whole using slices of a circular pie. A histogram, on the other hand, represents the distribution of numerical data by showing the frequency of data points within certain ranges (bins). The key distinguishing feature of a cartogram is its ability to convey data through spatial distortion, focusing on the data rather than geographical accuracy. This technique can help emphasize certain aspects of the data that might be less noticeable in more traditional visualizations.