Answer: Monocular
Explanation: Monocular cues refers to hints which gives information about the depth or distance of an object when viewed from a one dimensional space. The linear perspective is a Monocular depth cue which involves getting a perception of the depth of distance informaton of objects in area by creating an imaginary view of parallel lines which seems to converge at a point at a distant. With objects getting diminished as they reach the vanishing point. Actual distances seems to be difficult get in a Monocular cues though as object seems to become farther using a 1-D view.