This area chart visualizes the relationship between wine ID and alcohol content, using a sampled subset of data points from a WineQT CSV file. The chart fills the space beneath a brown line with a semi-transparent light blue area, making the trend easy to read. D3.js v6 builds the SVG with `d3.area` and `d3.line` paths, while `d3.axisBottom` and `d3.axisLeft` provide labeled axes. The data is filtered to every tenth point and sorted by ID, reducing visual density while preserving the overall pattern.