This example visualizes the cost of different phone models as a pie chart, with a legend listing each phone and its price in dollars. The chart is rendered using D3.js v5 with SVG, and the data is loaded from a CSV file. The code uses `d3.pie` and `d3.arc` to generate the pie segments, `d3.scaleOrdinal` with `schemeCategory10` for colors, and event listeners for mouseover interactions that log the price data to the console.