Motion parallax is a visual phenomenon that occurs when an observer moves through their environment. As the observer shifts position, objects that are closer appear to move faster across their field of view than those that are farther away. This difference in perceived motion helps the brain gauge depth and distance. This effect is commonly experienced while driving or walking. For example, when looking out the side window of a moving car, nearby trees and signs seem to zip by quickly, while distant mountains move slowly. This contrast aids in understanding spatial relationships in our surroundings.