ok, the admin gave me a warning for asking if i can cuss out the admin, weird right? i now have 8 warnings.

In contour drawing crossing lines is one way to indicate this

What is von petzinger really interested in finding out through her studies in cave art?

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