A donut chart displays the distribution of survey respondents across different age groups, with each segment colored distinctly and labeled with its corresponding value. Legends on the right identify each age group and its member count. The visualization uses D3 v5’s `pie` and `arc` generators to compute segment paths, `scaleOrdinal` for color mapping, and `format` for number formatting. Data is fetched as CSV from a GitHub gist, and the SVG is rendered within a React component.