This horizontal bar chart ranks the top 20 smartphone models by units sold (in millions), with each bar colored by brand using a pastel ordinal scale. The visualization uses React 16.9 and D3 v5, employing `scaleBand` for the categorical y-axis, `scaleLinear` for the numeric x-axis, and `scaleOrdinal` for color encoding. Data is fetched from a remote CSV, normalized from single-line format, and rendered as SVG rectangles with tooltips showing price, rating, and battery life.