activity 7.2
This area chart displays monthly visitor numbers for a full year, with values rising from 1,000 in January to a peak of 2,700 in December. The visualization uses D3.js version 6 with an SVG rendering approach, employing `d3.area()` to generate the filled path, `d3.scalePoint()` for the categorical month axis, and `d3.scaleLinear()` for the visitor count axis. Axes are rendered with `d3.axisBottom()` and `d3.axisLeft()`, with rotated month labels and explicit axis titles. The chart includes a steel-blue fill and uses hardcoded sample data embedded in the script.