A bare HTML page sets up an SVG canvas and uses D3 v5 to select it via `d3.select`, which is not a standard D3 API call; the code incorrectly styles the SVG background red. The page includes a stylesheet defining green line strokes, though the SVG contains no rendered marks. This minimal example demonstrates a starting point for an HTML-only D3 visualization in React, serving as a basic template rather than a functional graphic.