This line chart shows the number of car units sold per year, with time on the x-axis and units on the y-axis. The visualization uses D3 v5 with SVG rendering, employing `d3.scaleTime`, `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, and `d3.line` to draw the path. Data is loaded from a CSV file using `d3.csv` and parsed to create date objects for the temporal axis. The chart includes axis labels, a title, and styled grid lines.