On what basis should hatching and cross hatching be chosen?

Correct answer: Desired darkness of value and surface direction

Direct answer: A, the desired darkness of value and the direction of the surface. Hatching uses groups of parallel lines. Cross hatching adds another group of lines crossing the first group. The spacing, number, pressure and direction of lines affect the apparent value: closer or layered lines generally make an area look darker, while more open lines leave it lighter. Line direction can also follow the turning or surface direction of a form, helping the viewer understand its shape. A is correct because the technique should serve both tonal control and the description of form. B and C are unrelated to the visual purpose of the marks. D is incomplete because hatching is not chosen only by the name of a colour; it is especially useful for building light and dark values, often even in monochrome drawing. Memory cue: line density controls darkness, and line direction helps describe form.