01 What is the best reason to avoid rubbing the hand over a graphite sketch?
Answer and explanation
Correct answer: A. Graphite may smear and dirty tones and edges
Explanation: Graphite is a loose medium that can transfer under friction. When the hand repeatedly rubs the drawing, dark particles spread into lighter areas, flatten carefully built values, and soil clean edges. Option A is therefore correct. The paper does not necessarily tear immediately, the pencil’s hardness cannot change through hand contact, and rubbing cannot move a vanishing point; it only damages the surface appearance of the drawing.