A pie chart shows the average cost of living plus rent for various cities, with each slice colored and paired with a legend listing city names and values in thousands. The visualization loads CSV data from a GitHub gist via `d3.csv`, computes the pie layout using `d3.pie` and `d3.arc`, and encodes colors with `d3.scaleOrdinal`. It renders as SVG, styling text and legends through CSS, and formats tick values with `d3.format`.