Answer:
Closure
Step-by-step explanation:
Perceptual principle of closure refers to the unconscious effort that our brain made in order to 'complete' a missing piece that we see with our own perception.
Other example of the use of perceptual principle is when we heard a song lyrics that we know but the song suddenly stopped before finished. Most people will start to 'fill' in the next lyrics of the song in our head even after the music stop.