If a region of the film does not contact developer, what will that region look like?

The correct choice highlights that a region of the film that does not come into contact with the developer will remain clear. This is because the developer acts on the exposed areas of the film, helping to create the image by darkening those regions. If a portion of the film does not contact the developer—perhaps due to a physical barrier or insufficient immersion—it will not undergo the chemical reaction that leads to darkening. As a result, those areas will retain their original transparency, appearing clear compared to the developed sections of the film that have been exposed to the developer and have undergone the necessary chemical processes to create a visible image.