What is true of cross contour lines?

A. They can only be drawn on paper.
B. They can be seen on all objects.
C. They are invisible lines that add form to objects.



Answer :

Final answer:

Contour lines are essential in art for creating form and depth in shapes through the use of cross contour lines.


Explanation:

Contour lines are lines that follow paths across a shape to delineate differences in surface features, giving flat shapes a sense of form and creating the illusion of three dimensions. One type of contour line is cross contour lines, which delineate differences in surface features and can give the illusion of three dimensions or shading. Contour lines are crucial in creating the form and structure of objects in art, providing a visual guide for artists to represent shape and depth.


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