This example renders a simple smiley face in an SVG using D3 v7, with a yellow circle for the head, two black eye circles, and a half-arc mouth created via the `d3.arc` shape generator. The SVG is 900 by 500 pixels, and the face is centered by reading the width and height attributes from the DOM. Though the repository includes a `data.csv` file with country populations, the visualization does not use it; instead, all shapes are drawn statically with hardcoded coordinates and attributes. The code imports `select` and `arc` from D3 and appends the elements directly to the SVG.