what is the difference between art and design elements?

art elements - line, value, shape, form, space, color, texture
are things we use when we 
to 
compose with Design elements
Balance, Contrast, movement, emphasis, Pattern, Rhythm, proportion and Scale, Unity or Harmony.

when you write or talk about art we say things like
The lines had contrasting colors
the repeated shapes created a pattern

​are elements create design elements.

​assignment 2
Next - take a photo and put it on your working blog of layers of foliage that will be your next line drawing. Be thinking of what you want your choice line drawing to be.

link here