This line chart displays the number of music tracks released per year across three musical genres: Country, Pop, and Metal. Each genre is represented by a separate line path rendered as an SVG element. The visualization uses D3 v5 APIs including `scaleTime` and `scaleLinear` for axis scaling, `axisBottom` and `axisLeft` for tick generation, and `d3.line` for path creation. Data is loaded from a JSON file containing aggregated genre and date counts.