What is a significant feature of a "Mosaic" artwork?

A mosaic artwork is characterized by the use of small pieces, such as tiles, glass, or stones, which are assembled together to create an image or pattern. This technique allows for intricate designs and, often, vibrant colors. Each individual piece contributes to the overall composition, showcasing how diverse elements can come together to form a cohesive visual representation. This method has been used throughout history in various cultures for both artistic and decorative purposes.

In contrast, the other choices do not accurately represent a significant feature of mosaic art. A mosaic is generally not limited to single color tones; rather, it can encompass a wide range of colors and materials. Additionally, the arrangement of pieces is quite specific to achieve the desired image, so the idea of requiring no specific placement does not align with how mosaics are created. Lastly, while some mosaics may emphasize abstract forms, many are representational, depicting recognizable images or scenes. Therefore, the essence of a mosaic lies in its use of small pieces to construct a larger artwork.