Form

Form appears three-dimensional when changes in light and dark, or colour value, describe its turning surfaces. A lighter value can suggest a plane facing light, while a darker value can indicate a receding or shadowed plane. Therefore option A is correct. Colour does not automatically flatten form, value clearly affects it, and hue alone cannot create convincing volume without value or lighting changes.

The governing concept is the distinction between form shadow and cast shadow. Form shadow is the darker area that remains on the object’s own surface because that plane does not receive direct light. Therefore option B is correct. A shadow projected onto the floor or another surface is a cast shadow, the brightest region is a highlight, and the outer boundary is the contour rather than a tonal shadow.

The governing concept is foreshortening, a perspective effect in which a dimension pointing toward or away from the viewer is compressed on the picture plane. The object’s actual physical size does not change; only its projected appearance becomes shorter. Therefore option A is correct. Option B mistakes appearance for real measurement, while pencil hardness and paper roughness do not cause this spatial effect.

An imaginative sketch begins with an idea that may not be directly copied from a visible model. The artist must convert that idea into a clear visual form by making choices about shape, proportion, action and arrangement. Copying alone does not demonstrate imagination, while paper price and pencil brand do not determine the idea or communication. Thus, option B is correct because creativity must be supported by understandable form.

A sphere has a continuously curved surface, so its light changes gradually across the form. A drawing becomes convincing when the highlight passes smoothly through middle tones into the shadow, producing a rounded three-dimensional effect. A thick outline only indicates the boundary, and a contact shadow only shows where the sphere touches the ground. Uniform black removes tonal information. Hence, option C is correct.

The governing concept is simplifying a complex body part into a clear construction block. A wedge captures the foot’s length, width, taper, top plane, sole, and direction toward the ground. It also helps the artist place the ankle and toe region in correct relation before adding smaller forms such as toes. Thus option C is correct: the wedge is a structural guide for volume and weight, not a device that makes the foot round, hides toes, or applies only to shoes.

The governing concept is balance and support in figure construction. The weight-bearing leg is the leg positioned beneath the body's centre of gravity and usually shows a clearer supporting alignment from hip through knee to foot. Hip tilt and the relaxed position of the other leg provide supporting evidence. Option A is correct; darker shoes, clothing detail, or apparent leg length do not establish where the body's weight is actually carried.

In art, form refers to the three-dimensional shape or structure of an object. It has height, width, and depth, such as a ball, cube, or sculpture. Colour, line, and texture are also elements of art, but they do not define form. Exam tip: If a shape appears to have depth or volume, identify it as form.