This pie chart visualizes the calories burned per 30 minutes across different target muscle groups, with each slice color-coded by muscle type and paired with a legend. The visualization uses D3 v5’s `pie` and `arc` generators to calculate slice angles and paths, while `scaleOrdinal` maps categorical muscle groups to a fixed color palette. Data is loaded asynchronously from a CSV file using `d3.csv`, and values are parsed as numbers before being aggregated. The SVG is centered on the page, with all chart elements rendered as SVG shapes.