Composition describes placement of relative objects and elements in a work of art. Consequently, composition is a key aspect of a good work of art.
Read more at: http://photographylife.com/what-is-composition-in-photography#ixzz2i5UJ4jV0, ://www.photographymad.com/pages/view/10-top-photography-composition-rules, and at http://www.colorpilot.com/comp_rules.html.