Which of the following is an element of movement in art?

Movement in art refers to the way that the elements within a composition guide the viewer’s eye throughout the artwork. This concept encompasses the direction and flow created by lines, shapes, and other visual elements, leading the viewer to experience a sense of rhythm or progression within the piece. It can evoke feelings of motion or action, making the artwork dynamic and engaging.

When considering the other options, the study of proportion in objects pertains to how different elements relate to one another in size and scale, which influences aesthetics but does not directly address movement. The balance of colors used relates to color theory and how colors interact to create harmony, rather than directing the viewer’s gaze. Lastly, the equality of space in a piece addresses spatial composition and distribution but does not inherently imply the dynamic qualities associated with movement.

Thus, understanding direction and flow in a composition clearly aligns with the concept of movement in art, making it the most accurate choice in the context of this question.