Isha
Girl with blond hair in half shadow opens up the lesson everything on the face is curved and rounded which replicates the surfaces of cylinders which highlights five elements of shading:
1. Cast shadow: the darkest tone on your drawing, opposite the light source, where it blocks light and casts a shadow
2. Shadow edge: opposite the light source where the shape curves away from you but is not the very edge of the shape
3. Halftone: the medium value, neither in direct light or shadow
4. Reflected light: the light found along the edge of shapes and separates the darkness of the shadow edge to the dark cast edge
5. Full light: where the light source is full on, maybe represented by the clean paper surface or a clean light hue.