This pie chart shows the distribution of posts across platforms (Twitter, Facebook, Instagram, YouTube, Reddit) using data from a CSV file. It displays both the count and platform name directly on each slice, with a legend to the right for clear identification. The visualization is built with D3.js v7, using `d3.pie()` to compute the arc segments and `d3.arc()` for the slice geometry, while `d3.scaleOrdinal()` with `d3.schemeTableau10` assigns colors. Data aggregation relies on `d3.rollup()` to count platform occurrences, and the SVG output reserves extra canvas space for the legend.