This line chart displays the average closing price of a product over time, with a dropdown menu to filter the data by product. Built with React and D3 v5, it uses `scaleTime` and `scaleLinear` for the axes, and `line()` with `curveNatural` to draw a smooth path. The chart reads from a CSV file, and the interactive filter updates the y-scale and line to reflect the selected product's data.