This line chart displays average closing prices over time, with a dropdown menu to filter the data by product category. The visualization uses React state management to handle the product selection and dynamically update the filtered dataset. Built with D3 v5, it employs `scaleTime`, `scaleLinear`, and `line().curve(curveNatural)` to render the SVG path, while the data is loaded from a CSV file using `d3.csv`.