Final answer:
Hatching and crosshatching is a technique commonly used in art to create texture and value. Michelangelo's Head of a Youth and Right Hand from 1508 is an example of this technique.
Step-by-step explanation:
This technique is known as hatching and crosshatching and it is commonly used in art to create texture and value. It involves using various strokes to manipulate or press one layer of tissue over another, such as using parallel lines or intersecting lines to create shading.
An example of this technique can be seen in Michelangelo's Head of a Youth and Right Hand from 1508, where he used hatching and crosshatching to create shading and tonal variations.
Finally, artists can also use different types of pencils with varying levels of hardness to achieve different tones and values in their drawings.