{"version":"1.0","type":"rich","title":"Activity7:Questions:1","description":"This example shows the distribution of car classes as a simple pie chart, with each slice labeled by its category name and percentage of the total. It loads a CSV file using `d3.csv`, aggregates class counts with a `reduce` operation, and renders the chart with D3’s `d3.pie` and `d3.arc` methods on an SVG. A categorical color scale (`d3.scaleOrdinal`) assigns colors from `schemeCategory10`, and labels are positioned using the arc centroid calculation while the slice area is scaled by the outer radius.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/12f27d2b074347d1b63a12a08b7d307f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}