Anubis............................
Composition is the the arrangement of the visual elements in a painting or other artwork. It is how the elements - line, shape, color, value, texture, form, and space - are organized or composed according to the these principles - balance, contrast, emphasis, movement, pattern, rhythm, unity/variety - and other Elements of Composition, to give the painting structure and convey the intent of the artist.
You can see your art from a different view and understand how it is interpreted by those who view it. In this way you can improve it to convey exactly what you want to be taken from it.
D chemistry
The answer is chemistry because you have to use materials and figure out ur angles along with ur hipothosis