If you mess with me you die

Give an example that you've seen in your life that is described in one of piaget or erikson's stages.

Why do you think it took four different people to create a japanese woodcut? why didn't one person do all the work like most artists of today?

Where is the photoshop flaw in this picture? a. the fish is too large, b. the head has been pasted on another persons body,c. the guy has no hands, d. the background has been altered.