This interactive visualization explores global happiness data from 2015–2023, allowing users to switch between a choropleth map, leaderboard, line chart, and correlation matrix. The map colors countries by selected factors using d3.scaleSequential with interpolateYlGnBu, while the line chart compares individual country trends against the global average. The visualization uses d3-geo projections, d3-scale-chromatic, and SVG rendering, with support for zooming, tooltips, and animated year sliders.