Which of the following best describes a "mosaic"?

A mosaic is best described as a picture made of small pieces of stone or glass. This definition captures the essence of mosaics, which are art forms created by assembling various fragments—often colorful—into a cohesive image or design. Traditionally, these small pieces are meticulously arranged into patterns or scenes, showcasing the artistic skill and creativity involved in the craft.

In contrast, the other options present different types of visual representations that do not align with the specific characteristics of a mosaic. For instance, a large mural painted with watercolors can be considered a painted artwork but lacks the use of small, individual materials that define a mosaic. A digital collage of images typically consists of various photographic elements combined digitally, which also diverges from the traditional method of creating mosaics. Lastly, a collection of unconnected photographs does not involve the integration or arrangement of individual pieces into a unified picture, setting it apart from the concept of a mosaic.