Final answer:
Neutral colors such as blacks, whites, and beiges are used to create shades and reflections.
Step-by-step explanation:
The correct answer is D. neutral colors.
Neutral colors such as blacks, whites, and beiges are used to create shades and reflections. They do not belong to the warm or cool color groups.
For example, in Pierre Auguste Renoir's painting 'Mother and Child,' he used warm colors like oranges, pinks, and yellows to create a warm and cheerful scene. However, blacks, whites, and beiges would be considered neutral colors.