This example displays a horizontal bar chart of the top 20 companies by brand value, using a dataset loaded from a CSV file via `d3.csv`. The visualization renders SVG marks with React, mapping each company to a `rect` whose width is scaled by its brand value using `d3.scaleLinear` and whose vertical position is determined by `d3.scaleBand`. Axes are composed manually from tick marks and labels generated by the scales, with gridlines drawn as blue SVG lines.