Sketching

Correct answer: A. Lost edge

Explanation: The governing concept is edge control. A lost edge occurs when the boundary between a subject and its background becomes visually indistinguishable, usually because their values or colours are very similar. Option A is correct. A hard edge is sharply defined, an axis line indicates direction or structure, and a cast shadow is a shadow made by an object blocking light.

Correct answer: A. Visual hierarchy will weaken

Explanation: The governing concept is edge hierarchy: sharp, soft, and lost edges should be varied to guide attention. If every secondary edge is equally sharp, each part competes with the focal point, so the viewer receives no clear order of importance. Option A is correct. Uniform sharpness does not automatically clarify the focus, increase depth, or change the drawing’s tonal key.

Correct answer: A. Because of the head's curvature and perspective

Explanation: The governing concept is observing form in perspective. A head is a rounded volume, not a flat rectangle. When it turns three-quarters, the far side recedes and the curved surface compresses the visible width of the farther eye. Therefore option A is correct. The eye is not physically smaller; lighting may affect emphasis, but it does not cause the basic narrowing, and the nose does not enlarge the eye.

Correct answer: A. It follows the rounded surface and direction of the head

Explanation: The governing concept is construction over a curved three-dimensional form. In a three-quarter view, the facial centre line indicates the direction of the turning head and wraps across its rounded surface, so it may appear gently curved rather than like a straight vertical divider. Option A is correct. This does not mean every nose is crooked, and neither bent paper nor lighting physically bends the construction line.

Correct answer: A. Relationship between the eyelids and the eyeball

Explanation: The governing concept is structural observation rather than symbolic drawing. The eyelids wrap over and around a spherical eyeball, and their thickness, overlap, and direction change with the head’s turn. Reducing the eye to an almond symbol loses that eyelid–eyeball relationship, so option A is correct. The other choices describe unrelated facial or body relationships and are not the structure removed by simplifying the eye.

Correct answer: A. Surface direction, texture and distance from light keep changing

Explanation: The governing concept is continuous tonal modelling. Even on the lit side, different parts of a surface may turn at slightly different angles, have different textures, or lie at different distances from the light. These changes alter reflected illumination and produce subtle value shifts. Option A is correct; a lit area is not automatically one flat tone, and paper edges or pencil mistakes are not the general cause.