Final answer:
An art line is a visual element that is used to define shapes, indicate motion and emotion, and create forms. It can have different characteristics, such as being straight or curved, static or dynamic. Lines play a crucial role in creating compositions and establishing figure-ground relationships.
Step-by-step explanation:
An art line is a visual element that can be used to define shapes and figures, indicate motion and emotion, and create forms. It is the simplest visual element but plays a crucial role in creating compositions and establishing figure-ground relationships. Lines in art can have different qualities, such as being hard-edged and jagged or organic and flowing. They can also be straight or curved, static or dynamic, and can provide structure and direction to a composition.