A pie chart visualizes the cost distribution of protein present in various cereals, with each slice colored by cereal type and accompanied by a legend showing names and cost values. The data is loaded from a CSV file using `d3.csv` via the `getData` module, then processed with `d3.pie` and rendered as SVG arcs using `d3.arc`. Colors are assigned through `d3.scaleOrdinal`, and legend text formats costs with `d3.format`. The chart uses D3 v5 and is authored by divyagunuguntla.