This visualization presents a line chart of heart disease data, plotting cholesterol levels against patient age. The chart uses D3.js v5 to create SVG-based graphics, with time and linear scales (`d3.scaleTime`, `d3.scaleLinear`) mapping data to positions on axes generated by `d3.axisBottom` and `d3.axisLeft`. A path generated by `d3.line` connects the data points. Data is loaded from a remote CSV file and parsed before rendering.