A model is a three-dimensional of a person/thing or of a proposed structure.
A mock up is a model or replica of a machine or structure, used for instructional or experimental purposes.
A prototype is a first or preliminary version of a device or vehicle from which other forms are developed.
Answer: i really hope this helps you <3
Explanation: When some objects in an painting/picture/portrate are hidden by others, it gives the sight of overlapping objects and creates an illusion of space and a three-dimension feeling In landscape painting, layering the planes of the high ground, middle ground, and background into the illusion of space.
