What are some three techniques for showing perspective?

Three techniques for showing perspective in art and design include linear perspective, where parallel lines converge at a vanishing point on the horizon; atmospheric perspective, which uses color and clarity to create depth by making distant objects appear lighter and less detailed; and foreshortening, where objects are depicted shorter than their actual length to create the illusion of depth. These techniques help convey spatial relationships and enhance the three-dimensionality of a composition.