Answer:
Your instructor is making reference to a monocular depth cue known as: Linear perspective.
Step-by-step explanation:
Your instructor is making reference to a monocular depth cue known as: Linear perspective.
We know that is: Linear perspective, a system of creating an illusion of depth on a flat surface. All parallel lines in a painting or drawing using this system converge in a single vanishing point on the composition’s horizon line.