M3 What Impact of Resolution and Colour Depth have on File Size and Quality

The 3 images that are above are what happens when you change the size and quality of the image. The first image is the original image, the second image is the enlarged image which has lost some quality because of this and the third image is low quality image when saved.

When the image is enlarged the quality of the image is lost, this is because it is stretched and the image becomes pixelated.

When the image is saved with much less colours the image becomes pixelated and looks bad.