This example uses D3.js v7 to draw a simple cartoon face in an SVG canvas. The code creates a yellow circle for the head, two black circles for eyes positioned symmetrically around the center, and a mouth rendered as an arc path using D3's `arc()` generator. The example demonstrates basic SVG shape creation and attribute manipulation, with fixed pixel coordinates for the face features. The mouth is drawn with an inner and outer radius, spanning a half-circle angle range, and is translated to the face's center point.