Final answer:
Modern art includes a variety of forms such as abstract paintings, sculptures made from unconventional materials, and performance art, all of which represent the innovative spirit of the 20th and 21st centuries.
Step-by-step explanation:
When we think of modern art, it encompasses a broad range of artistic genres, materials, and forms of expression. This includes abstract paintings, which often break away from the traditional representation of physical objects and emphasize shapes, colors, and textures instead.
Another facet of modern art is the use of unconventional materials to create sculptures, reflecting a break from traditional sculpture materials like marble and bronze. Moreover, performance art has become an integral part of the modern art movement, an interdisciplinary mode that may involve audience participation and often emphasizes the concept over the physical art object. It's clear that all of the above-mentioned forms represent the spirit of modern art, with its roots in the cultural and technological changes that occurred in the 20th century and its growth and evolution into the 21st.