Shading is created using
a. varying proportions of the same color.
b. shades of black and white, or by using values of a single hue.
c. complimentary colors which blend together and create harmony.
d. tints and tones of a given hue.

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Which sout american country has the highest population density

To create an illustration of perspective, this artist did all of the following except 1) show clear orthogonal lines 2) have an implied vanishing point 3) distort proportion to keep the background and foreground the same size 4) include value changes between the foreground and background i was thinking maybe 1