This bubble chart displays global life expectancy against GDP per capita, with bubble size representing population and color indicating continent. The visualization includes an interactive tooltip showing country names on hover, plus a legend for population scale. Built with D3 v4, it uses SVG circles, d3.scaleLinear for axes, d3.scaleSqrt for bubble sizing, and d3.scaleOrdinal with d3.schemeSet1 for color mapping. The chart reads data from a CSV of three numeric variables per country and adds hover effects to highlight individual data points.