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What is necessary to make a sphere appear three-dimensional?

Answer and explanation

Correct answer: Gradual light and dark shading

The governing concept is tonal modeling: a solid form is shown by relating light, middle tone, and shadow. When light falls on a sphere, the illuminated area remains light, the opposite area becomes darker, and the transition between them is gradual. This produces the visual impression of curved surface and volume, so option A is correct. A circle or thick outline alone is flat, while an equal tone hides the form.

Related tags

Pencil ShadingSphere ShadingLight And ShadowThree-Dimensional FormDrawing BasicsArt EducationClass 9 Mcq

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