This bar chart displays letter frequencies from a small CSV dataset, with interactive bars that highlight and dim when selected by clicking. Built with React and D3 v7, the visualization uses `d3.scaleBand` for the categorical x-axis and `d3.scaleLinear` with a nice number of ticks for the count y-axis. The chart renders bars with rounded corners, transitions on hover and selection, and includes axis titles and a title text, all styled with the Inter font.