A grid of fifteen random smiley faces, each generated with varying facial features using React components. The example demonstrates how to compose and reuse SVG elements through React's component model, with faces rendered using D3's arc generator for the mouths and basic circles for the eyes and backgrounds. The code uses React 18 and D3 v7, and each face’s parameters—such as stroke width, eye offset, and mouth radius—are randomized to create visual variety across the grid.