He drew a horizon line to show where the sky and earth appear to meet.
He used a vanishing point to draw objects that run horizontally across the painting.
He used orthogonal lines to draw the sides of objects that run towards the vanishing point
I believe the answer is D
Answer: It's just not the same without the original guy. The original guy from blues clues ending up dying sadly.
Answer:
Photograph of painting by Pablo Picasso titled Violin