The answer / the sketch is clear as it shows the front view and the bottom view of the mechanisms, the duck moving and what causes the duck to move. There are also words to explain how does the duck moves. (: The answer is unclear as although there are explanation, there should be labels to see which one is at which direction and what is what. The drawings should be also more specific.
the drawings are clear as the artist provided different views on the sketchthe sketch of the keyboard is a bit unclear as i don't understand what the artist is trying to say