This example demonstrates how to construct SVG paths programmatically using D3.js’s `d3.path` object, including circles and a cubic Bézier curve drawn with explicit control points. The code defines reusable functions like `drawCircle` and `draw` to generate path strings, then appends a static path (`M50,50 C625,700 725,700 750,800`) to an SVG canvas, styling it with a black stroke and no fill. It also initializes a line generator via `d3.line` but does not render it, focusing instead on path string construction and inspection through console output. The visualization uses a fixed dataset of coordinates and renders entirely in SVG with D3 v5.