Mosaics, frescoes, and sculptures are all forms of literature, artistic techniques, ways to decorate walls, types of arches?

The correct answer is: artistic techniques.

Explanation: Mosaics, frescoes, and sculptures are all methods used by artists to create visual works of art. Mosaics involve assembling small pieces of colored materials to form images, frescoes are painted directly onto wet plaster, and sculptures are three-dimensional works created from materials like stone, metal, or clay. These techniques are essential in the field of visual arts and contribute to artistic expression.