This interactive chart displays changes in life expectancy over time for a selected country, alongside the global average trend. A dropdown menu lets users choose a country, triggering a new SVG line chart with axes and a legend. The visualization uses D3.js v6 to load CSV data, compute yearly averages, and render paths via `d3.line` and scales. It is built with React and renders using SVG, with data sourced from a GitHub-hosted CSV.