Points for yall :D (sadness)

Artists best achieve contrast in a composition by: a. drawing with realism b. shading a drawing with dark and light values c. using drawing techniques like stippling and hatching d. focusing on line and shape in a drawing

It is important to avoid doing too much editing to a photograph true or false

According to the hierarchy of chords, fill in the missing chord in this progression. i - iv - - i?