To discover why the sculptor of the amida nyorai depicted the subject with elongated earlobes, specific hand gestures, and a bun atop his head requires the use of:

when creating art, the more detail makes the art feel more life like. most sculptors like to make their sculptures seem as real as can be. most people are more amazed how much the sculptures look like they could be a real person than a sculpture that looks like the sculptor didn't take his time with it, but all art is amazing it its own way.