A line chart displays health scores across years from 2019 to 2023, with a steelblue line connecting red circular markers for each data point. The visualization uses D3.js v7 with an SVG rendering approach, employing `d3.scaleLinear` for both axes, `d3.line` to generate the path, and `d3.axisBottom`/`d3.axisLeft` for tick marks. Data is loaded asynchronously from a local CSV file via `d3.csv`, with the x-axis formatted as integers and axes labeled "Year" and "Health Score".