Explanation: The correct answer is (2) To show a geographic distribution of data. A data map is a visual representation that displays data points or values on a map, usually using colors or symbols to indicate different values or categories. It is commonly used to show the geographic distribution of data, such as population density, economic indicators, or disease outbreaks. While some of the other options you mentioned may be useful for data visualization, such as comparing data points or showing changes over time, a data map specifically focuses on presenting data in relation to geographical locations.