Final answer:
Diagonal lines in art convey energy, as they suggest movement and add to the rhythm and flow within the artwork.
Step-by-step explanation:
Diagonal lines in a work of art convey energy. These lines are read as active and suggest movement. According to the information provided, horizontal lines are calming, resembling the surface of water, while vertical lines are stable visuals, akin to tree trunks. Diagonal lines, however, are the most active because they suggest a notion of something being in motion, such as a character about to sprint. This is supported by the way rhythmic repetition in a painting can demonstrate movement, and how the use of bold and directional brushwork adds to the dynamic feel of a painting.
Diagonal lines can also contribute to a sense of rhythm/movement in a piece of art. They lead the viewer's eyes across the painting, creating a visual flow and adding to the narrative that the artist is trying to convey. Therefore, the vibrancy associated with diagonal lines stands in contrast to feelings of calmness and peacefulness.