In the Rubin vase illustration, the black shape can be seen alternately as a foreground object resembling a vase or as a background space between two white profiled faces. What is this relationship called?

- Figure-ground reversal.

Explanation:

The 'figure-ground reversal' is elucidated as the relationship displayed in two-dimensional artworks that aims to outline a visual illusion where the viewer's perception divulge between two distinct possibilities. Such an effect creates an illusion in the viewer's perception which makes it difficult for them to categorize between the background images and foreground image presented in the work.

In the given example, the confusion among the two alternate possibilities as the foreground object(in black shape) and the background space(available between 'the two white profiled faces') creates an illusion to remark one as the background and another as a foreground object. Therefore, it implies the 'figure-ground' reversal.'

hard bop is an extension of bebop that was kind of interrupted by the cool sounds of west coast jazz. it experienced its revival in the 1990’s.