Answer: Aerial perspective.
Step-by-step explanation:
This technique in art, and especially in painting, refers to the method of creating the illusion of depth by depicting distant objects as pale, less detailed, and usually blue than near objects. This definition fits in perfectly with the image shown here. A method of creating the illusion of depth or recession in a painting or drawing by modulating colours to simulate the changes the atmosphere makes to the brightness of things seen from a distance.