A. Yellow
i actually experienced it this morning when i woke up, i opened the blinds, and the light was completely yellow. It hurt my eyes because of the sudden hit of uv rays but, o well.<span />
The answer would be C, proportion is the relative size of parts of a whole whereas the scale is the size it would be compared to other objects.
He simplified everything down to the geometric essentials! Cylinder, sphere, cone, etc.
I think this artwork is amazing and it gives me a feeling of nature