fresh block
This visualization shows the percentage of internet users and GDP per capita for countries within a selected world region, using an interactive bar chart. Users choose a region via radio buttons, which filters the dataset and updates the chart with a sorting animation. The code uses D3 v4 to create SVG elements, including `d3.scaleBand` and `d3.scaleLinear` for axes, and `d3.csv` to load the data. Tooltips display country-specific GDP figures on hover.