4. Why do we use a 5-Value system of drawing?

When you get skilled at using the five values, your images will have the illusion of 3 dimensions, thus making them much more realistic. Value scales represent the amounts of lights and darks that might be in your drawing.

Explanation:

pitch- the definition of pitch is as follows:

"the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone."