This example demonstrates responsive axes that maintain consistent tick mark density as the visualization resizes. A bar chart displays NO2 levels across geographical areas, with tick counts dynamically calculated from the inner width and height divided by a fixed density value. The implementation uses D3.js v7, employing `axisBottom` and `axisLeft` for axis rendering, a `ResizeObserver` to track container dimensions, and `scaleBand`/`scaleLinear` for positional encoding. The axis modules recalculate tick counts on every resize event, ensuring labels remain readable at any screen size.