What type of art has no visible subject?

Name the tool that alan needs to use to complete his task. alan is trying to move the entire image on his screen. he needs to use the blank tool.

Most flexible painting medium, used to create both thin, polished layers and thick, gestural brushstrokes

The three-movement symphony of sorrowful songs features a different text for each movement. its second movement (below) concerns the plight of a young polish prisoner seeking the protection of the queen of heaven. who is the composer of this piece