This area chart visualizes yearly price data from a CSV file, displaying the trend as a semi-transparent steelblue region. The code loads the data using `d3.text` and parses it with `d3.csvParseRows`. It builds the chart with `d3.select`, `d3.scaleLinear`, and `d3.area`, rendering the area path and axes via `d3.axisBottom` and `d3.axisLeft` within an SVG.