Final answer:
Lighting in art can have a significant impact on how objects or people are portrayed. In this case, the student is noticing how dark lighting is affecting the boys' faces.
Step-by-step explanation:
The student is referring to the effect of light on the boys' faces. Lighting is an important element in art that can dramatically impact the way an object or person is perceived. In this case, the student is observing how the dark lighting is illuminating the boys' faces differently.
Shadows and the direction of light can create depth, highlights, and shadows, which can add dimension and mood to an artwork.