This pie chart visualizes the top 10 most populated U.S. states, with each slice labeled by its population in thousands and accompanied by a color-coded legend. Built with D3 v5, the code fetches CSV data via `d3.csv`, computes slice angles with `d3.pie`, draws arcs with `d3.arc`, and maps colors using `d3.scaleOrdinal`. Labels are positioned at each slice’s centroid, while the legend separately lists state names and values using SVG `rect` and `text` elements.