Five circles sit at fixed coordinates on an SVG canvas, each with a radius of 30 pixels. The visualization uses D3 v7’s selection and data join methods to bind the array of x/y points to circle elements, setting their positions via the `cx` and `cy` attributes. The React app measures its container dimensions and passes them, along with the static dataset, to a custom `viz` function that updates the SVG. The rendering relies on D3’s `select` and `join` APIs within a React component.