Why were instrument originally used? were there specific reasons why instruments were needed?

Which sentences correctly discusses linear perspective? in this perspective, lines converge to a vanishing point to produce an illusion of depth. you perceive depth when an objects size shrinks as its distance grows. the artist creates an illusion of depth through an increased blurring of lines and decreased detail of objects as they recede away from your view, as you might find in scenes of nature. you perceive depth through the contrast of the sharp foreground details with the muted tones and hazy images of the background.