The drawing technique of using dots instead of lines called stippling. Using lines instead of dots on the other hand is called hatching. Stippling involves placing individual dots across a surface in a pattern that will be identifiable. Individual dots are used to imply the shape, texture, or shadowing of a subject.
I can only answer some, but you'll have to answer the others. I already answered the 1st and 2nd question previously.
6. What is pigment?
It is basically another word for color. Having a move fancy definition though: a pigment is the natural color of an animal or plant tissue
8. What are the three primary colors?
Red, Yellow, and Blue
9. Why is violet called a secondary color?
Secondary colors are created mixing primary colors. Since red and blue make violet, it makes violet a secondary color.
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Answer: Stage Craft, Acting, Singing, Dance
Explanation: