Which of the following is a type of chart listed in the material?

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Charts are used to present information visually. A pie chart breaks a whole into slices to show proportions. A Gantt chart maps tasks over time and project schedules. A histogram displays how often numeric values occur within ranges. A link chart, as listed in the material, focuses on relationships or connections between items, often highlighting networks or dependencies. Because the material identifies a link chart as a type of chart, it is the correct choice in this context. The other options describe different standard visualizations that do not match what the material calls a chart type.