A yellow smiley face with animated eyebrows demonstrates fundamental DOM manipulation with D3 v5. Using SVG shapes, the code draws a circle for the face, two circles for eyes, and rectangles for eyebrows, while an arc generator creates the mouth. The eyebrows move vertically through chained `transition().duration()` calls, and the entire face is centered using an SVG `g` transform. This example focuses on core D3 selections and transitions.