The arrangement of opposite elements (light vs. dark colors, rough vs. smooth textures) to create visual interest.
The arrangement of similar elements (light and medium tones) to create visual interest.
A path made by a moving point in space.
Turning in artwork with a smudge
Staying inside the lines when coloring in a shape with marker
Turning in artwork with a tear on the paper
Ensuring glue did not smear or bleed out
An organic shape
A curvilinear line
A continuous line
Here's an interesting quiz for you.