The aspect of of instruments that improved during the Romantic period was the valves. The correct answer is D, valves.
<span>Jenny Holzer emphasized the lines through a spiral ramp, this created a visual connection through the lines. The way that its connected, can be seen as a flow of the movement of the underlying structure. She changed the motion of the lines by using variation and playing with the structure.</span>
I think it was Vincent Van Gogh.
