This example draws a simple face using D3.js by appending a circle to an SVG element. The circle’s radius is set to half the SVG’s height, with its center positioned at the middle of the drawing area. The code uses `select` from D3 to grab the SVG and `attr` to set the circle’s properties based on the width and height attributes. A CSS import loads the Ubuntu font, and the SVG is scaled and translated via its transform attribute.