What does a decrease in pixel count in an image usually affect?

A decrease in pixel count in an image typically impacts both file size and image quality. When pixel count is reduced, the overall number of pixels that compose the image is lessened, which directly contributes to a smaller file size. This means that the image can be stored and transmitted more efficiently, taking up less space on disk or bandwidth when downloaded.

In terms of image quality, decreasing pixel count often leads to a loss of detail and clarity. As there are fewer pixels to represent the image, fine details may become blurry or entirely lost. This degradation in quality is particularly evident when the image is enlarged or viewed at a higher resolution than it was intended for.

While it is true that such a reduction can also influence loading speed positively, as smaller file sizes typically load faster, the primary relationship is with the changes in file size and the resulting impact on image fidelity. Therefore, the correct answer is that a decrease in pixel count primarily affects both file size and image quality.