D2

Image 2 (JPEG)  is not blurry which means that is of a good quality, while image 3 (GIF) is visibly blurry which shows that it is not of a good quality.

From examining the different file types I have came to the conclusion that the JPEG file type is the closest to the original. This is because the other file types were too blurry and were unable to show the images in a good detail, but the JPEG file on the other hand is clear resolute.

Picture 1 - Original quality, picture 2 - low quality, picture 3 - medium quality, picture 4 - highest quality.

In comparison to the original image, the quality of pictures 2 and 3 is clearly worse as it is considerably more pixelated and blurry. The images are both suitable sizes which makes them easy to send via email and other applications.

Image 2 colour depth - 2, image 3 colour depth - 16, image 3 colour depth - 256 

The colour depth of 256 is the closest possible to the original image while the other two are once again noticeably blurry. This is because their colour depths are both significantly less than the second image.