Which of the following describes a scenario where size-distance illusion may occur?

The size-distance illusion is a perceptual phenomenon that occurs when the perceived size of an object is affected by its distance from the observer. The correct answer illustrates how individuals often perceive the shape of stable objects consistently, even when the distance and resulting retinal image of that object change. This reflects the brain's ability to interpret object size based on learned experiences and context, rather than direct visual input alone.

In this scenario, as the observer moves closer to or further away from an object, the size of the object's image on the retina changes. However, the observer can still maintain a consistent perception of the object’s size due to the brain compensating for the distance factor, demonstrating how stable shapes are recognized despite variations in retinal information.

Other options do not primarily relate to how the perception of size is maintained despite changes in visual input. High altitudes can affect perception of distance, but they do not specifically illustrate the size-distance illusion. Transitioning from day to night could influence visibility but does not directly address size perception or distance. Viewing objects from varying heights might alter perspective but again does not adequately capture the essence of how stable object shapes maintain perceived size against changes in distance.