Answer:
an ambiguous figure-ground relationship
Step-by-step explanation:
Figure-ground relationship: In psychology, the term "figure-ground relationship" is described as one of the different principles that are being included in the Gestalt principles related to perception. It represents that an individual's perceptual system tends to separate different stimuli into either ground elements or figure elements.
However, in an ambiguous "figure-ground relationship", the relationship can be interpreted in various ways.
In the question above, the given phenomenon is called as an ambiguous "figure-ground relationship".