elements and principles of design
The elements and principles of design are the two essential pieces to create a work of art.
The elements of design are those things that makeup a masterpiece like paintings, drawings and etc. It isn't necessary to have all of its components in one work. It only depends on the creator who wishes to.
While principles of design could be pictured out as the application of the factors of the elements of design. How well you use the components in the elements of design and how you use it by the many principles of design determines how good your work of art is.