Answer:
A. The light is affecting how the viewers see it through the density and shade of the colors that are portrayed in the painting.
B. The colors are being perceived as darker and more monotone. They blend together yet they separate each other and stand alone.
C. Yes and no. Some artists incorporate lighting into every painting they use. Like with 3D or realistic paintings. Some people paint 2D painting, with little to no light. So it depends but I recommend it.
Step-by-step explanation:
Why? Lighting is strategy used in different paintings and sometimes not used at all. Lighting is a good skill to learn but may not always be used. Have a good understanding of it is always nice.