Fork of D3-1: Making a face
A yellow circle face with blue eyes, black eyebrows, and a mouth formed by an arc sits centered in an SVG canvas. Two rectangular eyebrows animate upward simultaneously over two seconds, then return to their original positions. The code uses D3 v7 selections, including `d3.select` and `d3.append`, with SVG elements like `circle`, `rect`, and `path`, plus the `d3.arc` API for the mouth shape. Transitions are applied via `.transition().duration()` to animate the eyebrow movement.