Answer:

A drawing sheet changes when you draw a picture on it. ... But if the drawing is made with colours or pen, then it cannot be erased. Thus the change cannot be reversed.

Verified answer

Answer:

If the picture is drawn with a pencil, then it can be erased; hence change can be reversed. ... But if the picture is drawn with imperfect colouring it can be changed into new panting by me

Explanation:

I am an artist so I can make picture on coloured drwing sheet