How should the first layer be while shading in layers?

Correct answer: Light and even

The governing concept is gradual layering and reversible value control. The first layer should be light and even, so later layers can deepen selected areas progressively while preserving highlights and allowing corrections. Therefore, option C is correct. A very dark or heavily pressed first layer is difficult to lighten, and a patchy layer produces uneven texture before the form has been established. Use gentle pressure, maintain consistent coverage, and compare each added layer with the intended light direction.