Final answer:
Mottle is most visible in a low resolution, low contrast image intensification system, as it has minimal sharpness and intensity difference between areas.
Step-by-step explanation:
Mottle present in an image will be most visible in an image intensification system with low resolution and low contrast. In such a system, the lack of sharpness (low resolution) combined with a minimal difference in the intensity between adjacent areas (low contrast) can make mottle, which is the irregular arrangement or pattern of light and dark areas, more apparent. High-resolution systems provide sharper images that can make mottle less distinguishable, while high-contrast systems would create greater differentiation between light and dark areas, potentially obscuring the mottle. Therefore, a system described as 3. low resolution, low contrast would most likely render mottle more visible.