A linked choropleth map and scatter plot visualize global development indicators, letting users explore relationships between attributes like life expectancy, birth rate, and urbanization. Country colors encode urban population rate, while scatter plot points are colored by continent. Hovering highlights matching countries across both views, and axis buttons toggle between linear and logarithmic scales. Built with React and D3 v6, the visualization uses `d3.scaleLinear`, `d3.scaleLog`, and SVG transitions for animated updates.