Shading is using values to create the illusion of and depth in two dimensional objects.

Explanation:

Shading is using values to create the illusion of form and depth in two dimensional objects. For example, if you find a light source when drawing and shade from there, it’ll make the object have a more realistic, 3D look.

The defenition of form: the visible shape or configuration of something.

answer; his friendship with claude monet;

answer; the masks were used in rituals and celebrations, some tribes wore animal masks as a way of thinking the animals for their gift of food;