A single large circle is drawn in the center of an SVG canvas, creating a minimal abstract face. The example demonstrates basic D3.js shape creation and attribute manipulation. The code uses `d3.select` to target the SVG element, then appends a circle and sets its radius, horizontal position, and vertical position based on the SVG's dimensions. The circle's radius is half the SVG's height, and its center is placed at the midpoint of the width and height, resulting in a simple, responsive composition.