This pie chart visualizes the distribution of movie ratings below 5.0 across different genres. The D3.js v5 code fetches CSV data from a GitHub repository and uses `d3.pie` to compute arc segments, `d3.arc` for path generation, and `d3.scaleOrdinal` for color mapping. Each slice displays its numeric value using `d3.format`, with a legend generated from the genre field. The visualization is rendered as an SVG with a fixed width and height, using a categorical color palette.