This example creates a responsive scatter plot using D3 to visualize the relationship between bill length and flipper length in penguins, with data from the `@drbagwell/penguins` package. It uses `observeResize` from `@drbagwell/responsive-viz-axes` to dynamically update the SVG’s width and height, and `axes` to draw labeled axes. The plot renders semi-transparent gray circles on a gray background, filtering out any data points with missing measurements.